行株距比对超高产晚稻产量和上部三叶的影响  

Effects of Row Spacing Ratio on Yields and Top Three Leaves of Super High-Yielding Late Rice

作　　者：林洪鑫[1] 袁展汽[1] 彭春瑞[1] 肖运萍[1] 刘仁根[1] 汪瑞清[1] 

机构地区：[1]江西省农业科学院土壤肥料与资源环境研究所/农业部长江中下游作物生理生态与耕作重点实验室/国家红壤改良工程技术研究中心,南昌330200

出　　处：《中国稻米》2014年第3期17-22,共6页China Rice

基　　金：国家科技支撑计划(2012BAD15B03);江西省农科院青年创新基金(2010-CQN004)

摘　　要：2011和2012年,采用再裂区设计,以超高产晚稻淦鑫688和五丰优T025为材料,在31.20万丛/hm2密度下,研究了行/株距比对不同品种产量和上部三叶形态特征的影响及两者的关系。结果表明,淦鑫688不施氮时,RS/IS(行株距比值)为2.0和2.8的处理产量显著高于比值为5.0和1.3的处理;在施氮时,RS/IS为5.0和2.0的处理产量显著高于2.8和1.3的处理。五丰优T025不施氮时的产量表现为RS/IS为1.3的处理显著高于5.0和2.8的处理;而在施氮时表现为RS/IS为5.0的处理显著高于2.0和1.3的处理。施氮时,RS/IS为2.0的处理提高了氮素积累总量和氮肥表观利用率,而RS/IS为5.0的处理降低了籽粒需氮量;不论施氮与否,两个品种在RS/IS为2.0时,倒1至倒3叶的基角、开张角和叶长较小。In 2011 and 2012, a split-plot design experiment was carried on the effects of row spacing ratio （RS/IS） on yield and top three leaves of super high-yielding late rice Wufengyou T025 and Ganxin 688 in the same planting density of 31.20×10^4 hille/hm^2. The results indicated that the yield of RS/IS 2.0 and RS/IS 2.8 of Ganxin 688 were significant higher than that of RS/IS 5.0 and RS/IS 1.3 in no nitrogen condition, while the yield of RS/IS 5.0 and RS/IS 2.0 were significant higher than that of RS/IS 2.8 and RS/IS 1.3 in nitrogen condition. The yield of RS/IS 1.3 of Wufengyou T025 were significant higher than that of RS/IS 5.0 and RS/IS 2.8 in no nitrogen condition, while the yield of RS/IS 5.0 were significant higher than that of RS/IS 2.0 and RS/IS 1.3 in nitrogen condition. In nitrogen condition, RS/IS 5.0 and RS/IS 2.0 improved total amount of nitrogen accumulation and apparent nitrogen utilization, and RS/ IS 5.0 decreased nitrogen demand of grain. Whether nitrogen application or not, the basic angle, stretch angle and leaf length of top three leaves of two rice cultivar in RS/IS 2.0 were small.

关 键 词：水稻 超高产 行 株距比 施氮量 上部三叶 产量 

分 类 号：S511.05[农业科学—作物学]