Effects of Long-term Application of Manure on Water-dispersible Phosphorus and Morphological Distribution in Three Zonal Soils

doi:10.7668/hbnxb.20193743

Abstract

Abstract:

The effects of long-term manure application on water-dispersible phosphorus (P)content and morphological distribution in three zonal soils were explored to provide references for understanding the risk assessment of P loss. The soil samples were collected from the farmland in Daxing Beijing(Fluvo-aquic soils),Yueyang Hunan(Red earths)and Zhanjiang Guangdong(Humid-thermo ferralitic)from May 2021 to August 2021,the sample was a composite mix of five individual surface soil cores (0—20 cm). The characteristics of water-dispersible P,morphological distribution,and minerals contents were studied. Compared with the treatment without manure application,the water-dispersible P content of the three zonal soils in Daxing,Yueyang and Zhanjiang was significantly increased by 1.15,1.32,14.00 times,respectively. Long-term application of manure significantly changed the distribution ratio of different forms of water-dispersible P in the total soil water-dispersible P,and the proportion of particulate P in Daxing and Yueyang soils decreased significantly by 30.22 and 14.68 percentage points,respectively,while the proportion of dissolved P significantly increased by 29.83 and 28.06 percentage points,respectively. The proportion of colloidal P in Yueyang soil significantly decreased by 13.37 percentage,and the proportion of dissolved P in Zhanjiang soil with long-term manure application significantly increased by 8.24 percentage points,compared with the soils without manure application. Long-term manure application remarkablely changed the content of soil water-dispersible minerals. Compared to the control group without manure application, the content of water-dispersible calcium in Daxing, Yueyang, and Zhanjiang soils increased significantly by 0.55, 1.66, and 4.15 times, respectively. The water-dispersible magnesium content also significantly increased by 0.66, 1.46, and 8.39 times in these soils. Additionally, the water-dispersible aluminum content in Daxing soil increased by 9.09%, while it decreased significantly by 19.90% and 77.27% in Yueyang and Zhanjiang soils, respectively.The results of redundancy analysis showed that soil pH,cation exchange capacity (CEC), dissolved organic carbon (DOC),and water-dispersible mineral composition (Fe/Al/Ca/Mg)were the main predictors affecting soil water-dispersible P content and morphological distribution. Long-term manure application significantly increased the water-dispersible P content of the three zonal soils and affected the P transformation,which aggravated the risk of P loss. Long-term manure application favored the particulate P and colloidal P of Yueyang and Zhanjiang soils and the particulate P of Daxing soil transformed to the dissolved P. Therefore,long-term manure application mainly affects the water dispersible P forms by changing the transformation between particulate P and dissolved P.

Key words: Manure, Water-dispersible phosphorus, Zonal soil, Loss risk

WANG Zihao, DING Shuai, CHEN Shuo, ZHANG Shuai, AO Junhua, WEN Jiong, HA Xuejiao, CHEN Qing. Effects of Long-term Application of Manure on Water-dispersible Phosphorus and Morphological Distribution in Three Zonal Soils[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(S1): 321-330. doi: 10.7668/hbnxb.20193743.

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Figures/Tables 7

Tab.1 Fertilization management system of three kinds of zonal soil before the experiment

时间 Sampling time	取样地点 Sampling spot	种植作物 Planting crops	施肥处理 Fertilization treatment	养分投入量/(t/hm²) Nutrient input
时间 Sampling time	取样地点 Sampling spot	种植作物 Planting crops	施肥处理 Fertilization treatment	N	P₂O₅	K₂O
2021年5—8月	北京大兴	冬春季种茄子,	单施化肥	1.01	0.48	0.97
		秋冬季种茴香	施用粪肥	1.01	0.50	1.01
	湖南岳阳	菠菜和玉米轮作	不施肥	0.00	0.00	0.00
			施用粪肥	0.85	1.07	0.44
	广东湛江	甘蔗或火龙果	单施化肥	0.45	0.41	0.87
			施用粪肥	0.83	0.78	0.82

Fig.1 Effect of long-term manure application on the partial physicochemical properties of the three zonal soils Different lowercase letters on the column indicate significant differences in different zonal soils of the same fertilization type (P<0.05),and different uppercase letters indicate significant differences in different fertilization types of the same zonal soil (P<0.05).The same as Fig.2—3.

Fig.2 Effects of long-term application of manure on CaCl₂-P and Olsen-P content in three zonal soils

Fig.3 Effects of long-term application of manure on water-dispersible MRP content in three zonal soils

Fig.4 Effects of long-term application of manure on the morphological composition of water-dispersible phosphorus in soil

Tab.2 The content of water-dispersible minerals and soluble organic carbon in soils with different treatments mg/kg

处理 Treatment	铁 Iron	铝 Aluminum	钙 Calcium	镁 Magnesium	可溶性有机碳 Dissolved organic carbon
大兴化肥DX	13.19±0.29Ab	18.93±0.30Ab	179.63±7.26Ba	62.75±5.21Ba	259.47±9.89Ba
大兴粪肥DXF	13.54±0.18Ab	20.65±2.59Ab	279.14±2.87Aa	103.93±1.64Aa	558.47±15.04Aa
岳阳化肥YY	22.84±0.24Aa	39.64±1.71Aa	46.40±1.96Bb	23.25±0.87Bb	155.90±19.64Bb
岳阳粪肥YYF	17.72±0.30Ba	31.75±0.86Ba	123.58±3.87Ac	57.21±0.75Ab	288.14±6.93Ab
湛江化肥ZJ	ND	0.44±0.04Ac	32.56±1.11Bb	2.10±0.03Bc	28.70±0.23Bc
湛江粪肥ZJF	ND	0.10±0.02Bc	167.72±3.54Ab	19.71±0.32Ac	65.73±4.75Ac

Fig.5 Pearson correlation analysis and redundant analysis ^*.A significant difference (P<0.05);^**.A very significant difference (P<0.01);AP.Olsen-P content;CaP.CaCl₂-P content;TP.Soil total phosphorus content;PP.Particle phosphorus content;DP.True soluble phosphorus content;CP.Colloidal phosphorus content;WFe,WAl,WCa and WMg indicate the content of water dispersible iron,water dispersible aluminum,water dispersible calcium,and water dispersible magnesium,respectively.

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