不同生态条件下氮肥对玉米干物质积累、氮素分配及产量的影响

doi:10.7668/hbnxb.20193260

华北农学报 ›› 2023, Vol. 38 ›› Issue (3): 108-120. doi: 10.7668/hbnxb.20193260

所属专题： 玉米；土壤肥料；

• 资源环境·植物保护 • 上一篇下一篇

不同生态条件下氮肥对玉米干物质积累、氮素分配及产量的影响

杨绣娟¹, 孙继颖¹, 高聚林¹, 刘剑², 孟繁盛³, 张悦忠⁴, 温晓亮⁵, 王志刚¹, 于晓芳¹, 刘文翔¹, 王彦淇¹

¹ 内蒙古农业大学农学院,内蒙古呼和浩特 010019
² 内蒙古农业大学职业技术学院,内蒙古土默特右旗 014109
³ 赤峰市农牧科学研究院,内蒙古赤峰 024031
⁴ 内蒙古扎赉特旗农牧和科技事业发展中心,内蒙古音德尔 137600
⁵ 五原县农牧业技术推广中心,内蒙古五原 015100

收稿日期:2022-12-09 出版日期:2023-06-28
通讯作者:
孙继颖(1972-),女,内蒙古呼和浩特人,教授,博士,主要从事玉米栽培生理研究。
作者简介:
杨绣娟(1992-),女,山西大同人,博士,主要从事玉米生理生态研究。
基金资助:
内蒙古自治区科技成果转化专项(2020CG0030); 呼和浩特市科技计划项目(2020-农-1(2020-农-1); 内蒙古草原英才个人项目; 国家重点研发计划(2017YFD0300802); 农业部华北黄土高原地区作物栽培科学观测实验站(25204120); 财政部和农业农村部国家现代农业产业技术体系(CARS-02-63)

Effects of Nitrogen Fertilizer on Dry Matter Accumulation,Nitrogen Distribution and Yield of Maize under Different Ecological Conditions

YANG Xiujuan¹, SUN Jiying¹, GAO Julin¹, LIU Jian², MENG Fansheng³, ZHANG Yuezhong⁴, WEN Xiaoliang⁵, WANG Zhigang¹, YU Xiaofang¹, LIU Wenxiang¹, WANG Yanqi¹

¹ College of Agronomy,Inner Mongolia Agricultural University,Hohhot 010019,China
² Vocational and Technical College,Inner Mongolia Agricultural University,Tumed Right Banner 014109,China
³ Chifeng Academy of Agriculture and Animal Husbandry Sicence,Chifeng 024031,China
⁴ Inner Mongolia Jalaid Banner Agriculture,Animal Husbandry and Science and Technology Development Center,Yinder 137600,China
⁵ Wuyuan County Agriculture and Animal;Husbandry Technology Promotion Center,Wuyuan 015100,China

Received:2022-12-09 Published:2023-06-28

摘要/Abstract

摘要：

为探明内蒙古不同生态条件下氮肥施用量对玉米关键生育期干物质、氮素积累分配特点及对产量及其构成因素的影响,于2021年在内蒙古包头市土默特右旗、赤峰市松山区喀喇沁旗和巴彦淖尔市五原县3个生态区进行试验。以玉米品种先玉335、郑单958和京科968为试验材料,研究施氮量对玉米不同器官干物质和氮素积累、分配、转运及产量形成的影响。结果表明,生态区和氮肥互作对玉米干物质积累与分配、氮素积累与分配、产量及其构成因素有极显著影响。不同生态区玉米品种各器官干物质所占比重有差异,依次为籽粒>茎秆>苞叶+穗轴>叶片,差异主要表现在吐丝-成熟期阶段。N2水平下,先玉335具有较高的花前干物质积累量,郑单958具有较高的花后干物质积累量。N1水平下,京科968茎秆转运量、茎秆转运率、茎秆贡献率表现较好。不同氮效率玉米品种氮素积累量均随着生育期的推进呈现递增趋势。成熟期氮素在各器官分布表现为籽粒>叶片>苞叶+穗轴>茎秆。不同生态区玉米产量表现为喀喇沁旗>五原县>土默特右旗。土默特右旗N0水平下,产量表现为先玉335>京科968>郑单958;N1与N2水平下,产量表现为郑单958 >京科968>先玉335。五原县与喀喇沁旗在不同氮水平下,产量均表现为郑单958>京科968>先玉335,且品种间差异显著(P<0.05)。可见,氮肥水平对先玉335干物质积累的响应在五原县和土默特右旗较好,京科968和郑单958干物质积累的响应在喀喇沁旗较好。与京科968相比,先玉335、郑单958在生育后期能够更充分的利用氮肥。

关键词: 玉米, 生态条件, 氮肥, 干物质积累, 产量

Abstract:

In order to investigate the effects of nitrogen application rates on the accumulation and distribution characteristics of dry matter and nitrogen,yield and components of maize in the key growth period under different ecological conditions in Inner Mongolia,experiments were carried out in three ecological zones,Tumed Right Banner of Baotou City,Harqin Banner of Songshan District of Chifeng City and Wuyuan County of Bayannur City of Inner Mongolia in 2021.Using maize varieties Xianyu 335,Zhengdan 958 and Jingke 968 as experimental materials,the effects of nitrogen application rate on dry matter and nitrogen accumulation,distribution,transport and yield formation in different organs of maize were studied.The results showed that the interaction between ecological zone and nitrogen fertilizer had a extremely significant effects on dry matter accumulation and distribution,nitrogen accumulation and distribution,yield and its component factors.The proportion of dry matter in various organs of maize varieties in different ecological regions was different,in order of grain>stalk>cob+bract>leaf blade.The difference was mainly manifested in the silking maturity stage. At N2 level,Xianyu 335 had higher dry matter accumulation before flowering and Zhengdan 958 had higher dry matter accumulation after flowering.At the N1 level,the stalk transfer volume,stalk transfer rate and stalk contribution rate of Jingke 968 showed good performance.The nitrogen accumulation of maize varieties with different nitrogen efficiency showed an increasing trend with the advance of growth period.The nitrogen distribution in all organs at maturity stage was grain>leaf blade > cob + bract > stalk.The maize yield in different ecological regions was Harqin Banner>Wuyuan County>Tumed Right Banner.Under the N0 level of Tumed Right Banner,the yield was Xianyu 335>Jingke 968>Zhengdan 958;at the N1 and N2 levels,the yield performance was Zhengdan 958>Jingke 968> Xianyu 335.At the different nitrogen levels in Wuyuan County and Harqin Banner,the yields were Zhengdan 958>Jingke 968>Xianyu 335,and the differences between varieties were significant(P<0.05).In conclusion,the response of nitrogen fertilizer level to Xianyu 335 dry matter accumulation was better in Wuyuan County and Tumed Right Banner.And the response of Jingke 968 and Zhengdan 958 to dry matter accumulation was better in Harqin Banner.Compared with Jingke 968,Xianyu 335 and Zhengdan 958 had better utilization of nitrogen fertilizer at the later growth stage.

Key words: Maize, Ecological conditions, Nitrogen fertilizer, Dry matter accumulation, Yield

杨绣娟, 孙继颖, 高聚林, 刘剑, 孟繁盛, 张悦忠, 温晓亮, 王志刚, 于晓芳, 刘文翔, 王彦淇. 不同生态条件下氮肥对玉米干物质积累、氮素分配及产量的影响[J]. 华北农学报, 2023, 38(3): 108-120. doi: 10.7668/hbnxb.20193260.

YANG Xiujuan, SUN Jiying, GAO Julin, LIU Jian, MENG Fansheng, ZHANG Yuezhong, WEN Xiaoliang, WANG Zhigang, YU Xiaofang, LIU Wenxiang, WANG Yanqi. Effects of Nitrogen Fertilizer on Dry Matter Accumulation,Nitrogen Distribution and Yield of Maize under Different Ecological Conditions[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(3): 108-120. doi: 10.7668/hbnxb.20193260.

http://www.hbnxb.net/CN/Y2023/V38/I3/108

图/表 15

参考文献 34

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[33]	高敏, 朱庚振, 邹皆明. 控释氮肥施用方式及用量对玉米干物质积累及子粒产量的影响[J]. 农业工程, 2013, 3(5):133-135.doi:10.3969/j.issn.2095-1795.2013.05.039. doi: 10.3969/j.issn.2095-1795.2013.05.039
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	Li J, Cao G J, Geng Y H, Ye Q, Wang C Y, Zhang Y. Effects of different nitrogen application rates on dry matter accumulation,nitrogen absorption and utilization of spring maize[J]. Chinese Agricultural Science Bulletin, 2014, 30(27):208-212.

生态区 Ecological region	纬度 Latitude	经度 Longitude	全生育期Whole growth period
生态区 Ecological region	纬度 Latitude	经度 Longitude	降雨量/mm Precipitation	日照时数/h Sunshine hours	积温/℃ Accumulation temperature
土默特右旗Tumed Right Banner	40°32'N	122°48'E	234.17	1 330.70	3 206.0
五原县Wuyuan County	41°11'N	122°49'E	124.93	1 421.63	3 144.4
喀喇沁旗Harqin Banner	42°30'N	118°87'E	339.30	1 323.77	3 106.5

生态区 Ecological region	纬度 Latitude	经度 Longitude	全生育期Whole growth period
生态区 Ecological region	纬度 Latitude	经度 Longitude	降雨量/mm Precipitation	日照时数/h Sunshine hours	积温/℃ Accumulation temperature
土默特右旗Tumed Right Banner	40°32'N	122°48'E	234.17	1 330.70	3 206.0
五原县Wuyuan County	41°11'N	122°49'E	124.93	1 421.63	3 144.4
喀喇沁旗Harqin Banner	42°30'N	118°87'E	339.30	1 323.77	3 106.5

生态区 Ecological region	全氮/ (mg/g) Total N	pH值 pH value	碱解氮/ (mg/kg) Alkaline N	速效磷/ (mg/kg) Available P	有机质/ (g/kg) Organic matter	速效钾/ (mg/kg ) Available K
土默特右旗Tumed Right Banner	1.09	8.23	56.87	4.21	21.69	67.13
五原县Wuyuan County	0.64	8.97	33.66	12.21	8.66	107.07
喀喇沁旗Harqin Banner	0.59	8.34	35.19	15.79	7.53	91.07

生态区 Ecological region	全氮/ (mg/g) Total N	pH值 pH value	碱解氮/ (mg/kg) Alkaline N	速效磷/ (mg/kg) Available P	有机质/ (g/kg) Organic matter	速效钾/ (mg/kg ) Available K
土默特右旗Tumed Right Banner	1.09	8.23	56.87	4.21	21.69	67.13
五原县Wuyuan County	0.64	8.97	33.66	12.21	8.66	107.07
喀喇沁旗Harqin Banner	0.59	8.34	35.19	15.79	7.53	91.07

变异来源 Source of variation	穗数 Ears per hectare	穗粒数 Grains per spike	千粒质量 1000-seed mass	产量 Yield	氮肥偏生产力 NPFP	氮肥农学利用效率 NAE	自由度 df
地点Site(S)	462.04^**	28.99^**	289.55^**	105.01^**	40.45^**	9.93^**	2
氮肥Nitrogen fertilizer (N)	23.11^**	122.33^**	90.32^**	224.15^**	7 439.32^**	127.81^**	2
品种Variety (V)	17.52^**	5.08^**	71.92^**	32.91^**	46.54^**	13.64^**	2
地点×氮肥S×N	11.56^**	28.67^**	4.99^**	14.24^**	19.24^**	15.92^**	4
地点×品种S×V	3.33^*	34.39^**	7.35^**	14.81^**	12.62^**	3.33^*	4
氮肥×品种N×V	14.05^**	6.93^**	10.34^**	7.38^**	14.77^**	6.65^**	4
地点×氮肥×品种S×N×V	8.21^**	12.68^**	3.01^**	2.49^*	5.61^**	2.22^*	8

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不同生态条件下氮肥对玉米干物质积累、氮素分配及产量的影响

Effects of Nitrogen Fertilizer on Dry Matter Accumulation,Nitrogen Distribution and Yield of Maize under Different Ecological Conditions

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生态区 Ecological region	品种 Variety	处理 Treatment	穗数/(穗/hm²) Ears per hectare	穗粒数 Grains per spike	千粒质量/g 1000-seed mass	产量/(kg/hm²) Yield
土默特右旗	先玉335	N0	56 695.00±1 667.50e	653.09±30.35a	341.67±9.67d	10 874.89±538.82d
Tumed Right		N1	57 250.83±962.73e	694.43±30.60a	375.03±3.61c	12 820.71±545.80c
Banner		N2	62 253.33±962.73c	656.32±45.00a	412.63±22.36b	14 301.97±649.47b
	京科968	N0	59 474.17±962.73cd	445.45±38.76b	394.57±13.11bc	8 883.69±797.56e
		N1	60 585.83±2 547.15cd	655.31±23.16a	391.10±15.98bc	13 183.25±457.12bc
		N2	69 479.17±4 196.45a	644.05±14.54a	413.40±8.71b	15 747.00±1 497.50a
	郑单958	N0	62 253.33±2 547.15c	408.11±6.84b	395.93±5.79bc	8 550.48±398.71e
		N1	63 920.83±3 471.18bc	654.93±11.12a	399.57±12.81b	14 198.23±114.55b
		N2	67 811.67±2 547.15ab	661.44±10.40a	438.63±3.39a	16 716.28±378.11a
五原县	先玉335	N0	65 032.50±3 335.00bc	619.20±16.24cd	381.37±1.14e	13 066.82±1 047.52d
Wuyuan		N1	66 700.00±1 667.50b	684.08±36.31a	399.37±2.53cd	15 502.02±1 210.60c
County		N2	67 811.67±2 547.15b	675.99±3.17a	425.03±11.24a	16 556.80±624.20abc
	京科968	N0	61 697.50±1 667.50c	655.91±5.61ab	389.77±10.77de	13 407.89±558.22d
		N1	67 255.83±2 547.15b	657.69±7.45ab	418.90±6.10ab	15 745.70±481.66bc
		N2	72 258.33±1 925.46a	644.27±16.19bc	426.63±10.76a	16 877.57±576.96ab
	郑单958	N0	65 032.50±1 667.50bc	611.73±10.65d	408.33±6.05bc	13 805.61±363.93d
		N1	67 811.67±962.73b	669.49±5.69ab	425.17±4.78a	16 408.66±437.98abc
		N2	74 481.67±2 547.15a	664.00±1.03ab	420.07±8.15ab	17 653.94±490.37a
喀喇沁旗	先玉335	N0	90 045.00±2 888.19a	532.96±23.15c	308.50±4.75g	12 603.55±1 117.48d
Harqin		N1	72 814.17±2 547.15c	588.67±47.77b	336.37±9.71ef	12 224.19±356.31d
Banner		N2	75 593.33±1 925.46c	610.10±31.09b	363.00±6.81bc	14 239.86±1 080.07c
	京科968	N0	83 375.00±3 335.00b	610.79±18.18b	328.47±3.19f	14 224.02±892.05c
		N1	83 930.83±3 471.18b	658.76±21.21a	347.47±4.65de	16 338.84±1 102.53b
		N2	83 930.83±3 471.18b	698.38±6.73a	355.30±3.56cd	17 702.77±786.23ab
	郑单958	N0	76 149.17±962.73c	600.33±23.38b	374.13±16.47ab	14 527.54±558.21e
		N1	85 598.33±2 547.15ab	603.81±21.77b	379.67±3.06a	16 671.18±458.87ab
		N2	83 930.83±962.73b	668.93±3.20a	374.47±1.92ab	17 869.77±169.24a

变异来源 Source of variation	自由度 df	花前干物质积累量 Dry matter accumulation before flowering	花后干物质积累量 Dry matter accumulation after flowering	花前干物质积累率 Dry matter accumulation rate before flowering	花后干物质积累率 Dry matter accumulation rate after flowering
地点Site(S)	2	86.17^**	28.45^**	ns	ns
氮肥Nitrogen fertilizer (N)	2	844.35^**	28.97^**	97.57^**	97.57^**
品种Variety (V)	2	146.16^**	9.41^**	56.49^**	56.49^**
地点×氮肥S×N	4	2.96^*	3.71^**	4.24^**	4.24^**
地点×品种S×V	4	36.40^**	14.01^**	20.07^**	20.07^**
氮肥×品种N×V	4	5.55^**	6.05^**	6.99^**	6.99^**
地点×氮肥×品种S×N×V	8	10.18^**	7.27^**	10.38^**	10.38^**
误差均方Error mean square	54	19.74	53.74	1.85	1.85

生态区 Ecological region	品种 Variety	处理 Treatment	花前干物质积累量/(g/株) Dry matter accumulation before flowering	花后干物质积累量/(g/株) Dry matter accumulation after flowering	花前干物质积累率/% Dry matter accumulation rate before flowering	花后干物质积累率/% Dry matter accumulation rate after flowering
土默特右旗	先玉335	N0	127.43±3.88g	208.25±12.47ab	38.00±2.10f	62.00±2.10a
Tumed Right		N1	179.10±2.42c	190.18±2.72cd	48.50±0.33ab	51.50±0.33de
Banner		N2	196.27±4.65b	208.92±11.10ab	48.46±1.74ab	51.54±1.74de
	京科968	N0	164.97±1.69d	190.45±5.07cd	46.42±0.87bc	53.58±0.87cd
		N1	182.55±6.24c	211.15±11.05ab	46.39±2.13bc	53.61±2.13cd
		N2	208.86±3.22a	201.89±8.44bc	50.86±1.44a	49.14±1.44e
	郑单958	N0	145.68±1.55f	184.57±7.79d	44.13±1.28d	55.87±1.28c
		N1	155.76±7.81e	223.10±5.18a	41.10±1.74e	58.90±1.74b
		N2	196.02±4.76b	205.44±8.69bc	48.84±1.64ab	51.16±1.64de
五原县	先玉335	N0	139.72±4.15f	210.68±11.52b	39.90±2.01e	60.10±2.01a
Wuyuan		N1	157.36±3.37e	231.26±6.96a	40.50±1.13e	59.50±1.13a
County		N2	191.19±2.43c	231.38±5.28a	45.25±0.86d	54.75±0.86b
	京科968	N0	162.79±4.55de	213.33±8.76b	43.29±1.44d	56.71±1.44b
		N1	197.38±4.85c	205.09±6.84bc	49.05±1.45bc	50.95±1.45cd
		N2	219.89±1.48a	203.15±2.93bc	51.98±0.40a	48.02±0.40e
	郑单958	N0	168.74±4.81d	185.88±6.71d	47.59±1.51a	52.41±1.51c
		N1	191.15±6.04c	196.55±2.79cd	49.30±1.13bc	50.70±1.13cd
		N2	209.56±1.63b	205.35±6.84bc	50.52±0.90ab	49.48±0.90de
喀喇沁旗	先玉335	N0	153.99±2.17f	209.02±9.24d	42.44±1.29e	57.56±1.29a
Harqin		N1	181.01±3.44d	207.60±2.47de	46.58±0.75abcd	53.42±0.75bcde
Banner		N2	201.80±3.58b	236.24±6.57a	46.07±0.96cd	53.93±0.96bc
	京科968	N0	169.69±2.66e	197.64±6.62e	46.20±0.99cd	53.80±0.99bc
		N1	190.93±7.44c	220.22±6.16bc	46.43±1.66bcd	53.57±1.66bcd
		N2	211.32±4.28a	223.73±4.08bc	48.57±0.94ab	51.43±0.94de
	郑单958	N0	172.90±0.88de	213.10±1.31cd	44.79±0.10d	55.21±0.10b
		N1	199.24±1.67b	221.68±1.17bc	47.33±0.15abc	52.67±0.15cde
		N2	218.15±9.77a	229.77±10.30ab	48.70±2.24a	51.30±2.24e

生态区 Ecological region	品种 Variety	处理 Treatment	叶转运量/ (g/株) Leaf transport volume	茎秆转运量/ (g/株) Stalk transport volume	叶转运率/% Leaf transport rate	茎秆转运率/% Stalk transport rate	叶片贡献率/% Leaf contribution rate	茎秆贡献率/% Stalk contribution rate	花后物质积累贡献率/% Contribution rate of material accumulation after anthesis
土默特右旗	先玉335	N0	9.37±0.32h	8.20±0.48i	20.44±0.16g	12.59±0.67h	4.75±0.20f	4.16±0.34f	91.09±0.67a
Tumed Right		N1	18.69±0.41b	42.73±0.45d	34.55±0.38b	41.98±0.41c	8.48±0.38b	19.38±0.72b	72.15±0.31g
Banner		N2	15.08±0.27f	45.61±0.48c	27.66±0.35e	41.14±0.30c	6.36±0.40e	19.21±0.37b	74.44±0.35e
	京科968	N0	23.19±0.10a	32.83±0.44f	40.76±0.58a	37.10±0.36e	10.48±0.38a	14.85±0.32d	74.68±0.51e
		N1	17.89±0.18c	37.95±0.18e	30.86±0.46d	39.11±0.13d	7.51±0.29cd	15.91±0.24c	76.58±0.57d
		N2	18.78±0.23b	56.09±0.42a	31.71±0.19c	47.65±0.66a	7.61±0.33c	22.73±0.27a	69.66±0.75h
	郑单958	N0	11.71±0.31g	28.98±0.59g	25.37±0.54f	35.46±0.81f	5.84±0.12e	14.46±0.42d	79.70±0.42c
		N1	16.33±0.40e	19.01±0.41h	30.75±0.25d	24.90±0.43g	6.94±0.51d	8.07±0.20e	84.99±0.10b
		N2	17.30±0.54d	48.32±0.46b	31.12±0.16cd	44.81±0.16b	7.07±0.13d	19.76±0.47b	73.17±0.29f
五原县	先玉335	N0	21.78±0.39b	9.30±0.23i	41.59±0.39a	14.09±0.61h	10.35±0.24a	4.45±0.45h	85.21±0.38b
Wuyuan		N1	13.16±0.62f	11.58±0.28h	23.57±0.51e	15.72±0.49g	5.94±0.34ef	5.19±0.22g	88.86±0.48a
County		N2	10.99±0.42g	39.80±0.04d	20.08±0.44h	38.57±0.18c	4.43±0.74g	16.11±0.30d	79.46±0.48d
	京科968	N0	12.82±0.32f	30.48±0.31f	23.86±0.40g	37.47±0.47d	5.77±0.14f	13.70±0.65e	80.53±0.36c
		N1	18.96±0.37d	41.18±0.32c	31.11±0.66d	40.42±0.78b	8.08±0.50cd	17.50±0.40c	74.42±0.49f
		N2	23.53±0.36a	48.36±0.40a	34.28±0.22b	42.61±0.51a	9.63±0.54b	19.82±0.10a	70.55±0.40h
	郑单958	N0	14.99±0.67e	23.17±0.46g	29.82±0.43g	27.03±0.56f	7.46±0.27d	11.55±0.41f	81.00±0.40c
		N1	14.88±0.30e	36.43±0.25e	27.78±0.35f	36.29±0.12e	6.58±0.41e	16.10±0.32d	77.33±0.24e
		N2	19.77±0.35c	44.19±0.41b	32.97±0.79c	39.59±0.59b	8.51±0.25c	19.05±0.38b	72.43±0.32g
喀喇沁旗	先玉335	N0	19.35±0.15b	18.32±0.67g	37.60±0.55b	23.00±0.74g	8.92±0.32b	8.46±0.35g	82.62±0.54a
Harqin		N1	16.95±0.58d	36.00±0.29d	31.69±0.53c	36.41±0.35cd	7.49±0.28c	15.92±0.07c	76.59±0.39d
Banner		N2	14.85±0.53e	45.53±0.39b	25.55±0.30f	40.87±0.35ab	5.73±0.40d	17.56±0.14b	76.72±0.18d
	京科968	N0	20.84±0.33a	32.18±0.11e	39.69±0.20a	36.96±0.29c	9.59±0.17a	14.84±0.29e	75.58±0.23e
		N1	14.40±0.18e	35.64±0.46d	24.90±0.44f	35.67±0.34e	6.14±0.36d	15.20±0.45de	78.66±0.35c
		N2	19.43±0.35b	46.77±0.43a	30.66±0.36d	41.43±0.29a	7.68±0.41c	18.59±0.14a	73.73±0.50g
	郑单958	N0	19.79±0.31b	25.71±0.32f	37.07±0.36b	28.85±0.40f	8.95±0.32b	11.62±0.40f	79.43±0.33b
		N1	17.79±0.48c	37.25±0.14c	28.62±0.26e	36.03±0.10de	7.47±0.33c	15.66±0.37cd	76.88±0.73d
		N2	19.16±0.37b	45.94±0.15b	28.75±0.62e	40.34±0.36b	7.47±0.14c	17.92±0.43b	74.61±0.30f

变异来源 Source of variation	自由度 df	V3-V6	V6-V12	V12-VT	VT-R3	R3-R6
地点Site(S)	2.00	170.24^**	75.38^**	103.72^**	147.58^**	78.65^**
氮肥Nitrogen fertilizer (N)	2.00	339.84^**	172.17^**	114.11^**	16.27^**	37.74^**
品种Variety (V)	2.00	87.66^**	221.23^**	6.31^**	113.72^**	117.52^**
地点×氮肥S×N	4.00	24.65^**	5.64^**	5.82^**	9.41^**	56.18^**
地点×品种S×V	4.00	11.39^**	56.55^**	16.18^**	49.69^**	12.53^**
氮肥×品种N×V	4.00	35.93^**	16.87^**	8.28^**	7.74^**	9.70^**
地点×氮肥×品种S×N×V	8.00	9.02^**	28.82^**	3.47^**	10.45^**	5.46^**
误差均方Error mean square	54.00	0.00	0.00	0.01	0.01	0.02

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不同生态条件下氮肥对玉米干物质积累、氮素分配及产量的影响

Effects of Nitrogen Fertilizer on Dry Matter Accumulation,Nitrogen Distribution and Yield of Maize under Different Ecological Conditions

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