不同控水时期和控水强度对水稻籽粒灌浆特性影响

doi:10.7668/hbnxb.2015.S1.021

摘要/Abstract

摘要： 为深入研究不同控水时期和控水强度下水稻的籽粒灌浆特性,选用上育397和绥粳3号2个水稻品种,应用Richards方程对抽穗后1~10,11~20,21~30 d土壤水势分别为-30~-35,-60~-65 kPa的水稻优、劣势粒的灌浆过程进行比较分析.结果表明:不同控水时期处理中,且不论控水强度,抽穗后1~10 d控水处理显著降低了两品种总千粒质量及优、劣势粒千粒质量,抽穗后11~20,20~30 d控水对千粒质量影响不大,甚至有增加趋势.与对照比较,当土壤水势为-30~-35 kPa时,抽穗后1~10 d处理两品种优势粒起始生长势降低,灌浆速率变化不大,灌浆时间前期延长,中后期缩短,贡献率前期增加,中后期降低,对劣势粒影响因品种而异;抽穗后11~20 d处理对两品种优、劣势粒影响都比较大,上育397优、劣势粒表现一致,灌浆速率明显下降,灌浆时间前期缩短,中后期延长,贡献率前期降低,中后期增加,而绥粳3号优、劣势粒表现正好相反;抽穗后21~30 d处理对两品种优势粒灌浆特征影响不大,对劣势粒灌浆特征影响较大;当控水强度加大后,对两品种优、劣势粒灌浆特征影响仍表现抽穗后1~10 d处理影响较大.

关键词: 控水时期, 控水强度, 水稻, 籽粒灌浆

Abstract: To study grain-filling characteristics of rice in different water-controlled periods and intensity,superior and inferior grains characteristics of two rice cultivars (Shangyu 397 and Suijing 3) was comparatively analyzed with Richards equation W=A/(1+Be^Kt)^1/N and three water-controlled periods,i.e.1-10,11-20,21-30 days after heading and two types of intensity,i.e.at-30-35,-60-65 kPa of soil water potential.The results showed that 1-10 d after heading water-controlled treatment,regardless of water-controlled intensity,significantly reduced the 1000-grain weight of total grains,superior grains and inferior grains of two varieties,11-20,20-30 d after heading water-controlled treatment had little effect on 1000-grain weight,and had even increasing trend.Compared with 0 kPa (CK) soil water potential,when the soil water potential of-30-35 kPa,1-10 d after heading water-controlled treatment made initial grain-filling potential of superior grain of two rice varieties reduced,filling rate changed little,the grain-filling time and contribution rate of the early stage prolonged,and the grain-filling time and contribution rate of the middle and late stage shortened.The impact on the inferior grain varies with species.11-20 d after heading water-controlled treatment had significant effect on superior and inferior grains characteristics of two rice cultivars.Superior and inferior grains characteristics of Shangyu 397 had consistent performance.Filling rate was significantly decreased,the grain-filling time and contribution rate of the early stage was shortened,and the grain-filling time and contribution rate of the middle and late stage was prolonged.Superior grains characteristics of Suijing 3 showed the opposite of inferior grains.21-30 d after heading water-controlled treatment had little effect on superior grains filling characteristics of the two varieties,yet had greater effect on inferior grains filling characteristics.When water-controlled intensity increased,effect of 1-10 day after heading water-controlled treatment on superior grains and inferior grains filling characteristics grains of the two varieties was greater than that of other treatments.

Key words: Water-controlled periods, Water-controlled intensity, Rice, Grain-filling characteristics

中图分类号:

S511.01

薛菁芳, 陈书强. 不同控水时期和控水强度对水稻籽粒灌浆特性影响[J]. 华北农学报, 2015, 30(S1): 112-119. doi: 10.7668/hbnxb.2015.S1.021.

XUE Jing-fang, CHEN Shu-qiang. Effect of Different Water-controlled Periods and Intensity on Grain Filling Characteristics of Rice[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(S1): 112-119. doi: 10.7668/hbnxb.2015.S1.021.

http://www.hbnxb.net/CN/Y2015/V30/IS1/112

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