氮素穗肥施入时期对滨海盐碱地水稻产量及氮肥利用率的影响  

Effects of different application stage of panicle nitrogen fertilizer on yield and stomatal conductance of rice in coastal saline-alkaline land

作　　者：付立东[1] 王宇[1] 李旭[1] 隋鑫[1] 任海[1] 李宝军[1] 

机构地区：[1]辽宁省盐碱地利用研究所,辽宁盘锦124010

出　　处：《广东农业科学》2012年第23期46-48,56,共4页Guangdong Agricultural Sciences

基　　金：农业部超级稻新品种选育与示范项目(农财发[2009]1号);辽宁省科技攻关项目(2009201003)

摘　　要：以水稻品种盐丰47为材料,采用小区对比试验方法,探讨了氮素穗肥不同施入时期对滨海盐碱地水稻生育、产量以及氮肥利用率的影响。结果表明,倒4叶施入促花肥(N:37.67 kg/hm2)、倒2叶施入保花肥(N:16.15 kg/hm2)可提高水稻茎蘖成穗率、单位面积收获穗数及颖花量,提高水稻齐穗期群体高效叶面积指数、剑叶叶绿素含量以及剑叶净光合速率与气孔导度,改善群体质量,促进干物质产量、齐穗后干物质积累量占籽粒产量百分比的增加。获得单产9.32 t/hm2,氮肥利用率达到37.4%。The paper used Yanfeng47 as material and studied the effects of different application stage of panicle nitrogen fertilizer on breeding traits, yield and stomata] conductance of rice in coastal saline-alkaline areas. The results by plot contrast test method showed that the reciprocal fourth leaf applied in promoting flower fertilizer and reciprocal second leaf applied in preserving flower fertilizer,it could increase the tiller spike rate, the harvest panicle number and spikelet numbers per unit area; also high effective leaf area index of rice population, chlorophyll content, net photosynthetic rate and stomatal conductance of the first leaf of the rice full heading, improved the population quality; promoting dry matter yield and dry matter accumulation alter full heading accounted for the percentage of yield. The unit yield reached 9.32 t/bm2 and the nitrogen utilization efficiency got 37.4%.

关 键 词：水稻 氮素穗肥 干物质积累量 氮肥利用率 产量 

分 类 号：S511.062[农业科学—作物学]