N素基蘖与穗肥不同比例对水稻群体指标的影响  

Effect of Proportion of Basal,Tillering and Panicle Bearing N Fertilizer on Population Parameters in Rice

作　　者：王宇[1] 鲁宪双 付立东[1] 任永泉[1] 娄伟[1] 郭向东 

机构地区：[1]辽宁省盐碱地利用研究所,辽宁盘锦124010 [2]大洼县西安农场,辽宁盘锦124200 [3]大洼县农业技术推广中心,辽宁盘锦124200

出　　处：《北方水稻》2008年第5期23-27,共5页North Rice

摘　　要：通过东风、西安两地大区试验,探讨了N素基蘖与穗肥不同比例对水稻群体各指标的影响。结果表明,N素基蘖与穗肥比为25∶3∶的GN处理,在N-n叶龄期够苗后,高峰苗得到较好控制,获得高成穗率;抽穗到成熟期干物质积累量最高,分别为708.9、743.4 kg/667 m2,两处理的产量也最高,分别为759.7、805.9 kg/667 m2;基蘖肥所占比例的增加有利于提高分蘖率,对叶龄影响不大,但过重施用基蘖肥,无效分蘖多,高效叶面积率和有效叶面积率降低,而适量增加穗肥,有利于提高高效叶面积率和有效叶面积率。Through the experiments conducted in Dongfeng and Xi＇an, the results showed that the treatment with the basal fertilizer： tillering fertilizer： panicle fertilizer being 2：5：3 intwo locations could gain high effective panicle rate and the dry matter accumulated amounts from heading to maturity reached 708.9 and 743.4 kg/667 m^2, and the grain yields were 759.7 and 805.9 kg/667 m^2. The moderate increase of basal and tiliering N was helpful to increase tillering rate, but excessive application of basal and tillering N Would lead to occurrence of ineffective tillers and decrease of effective leaf area rate. It was beneficial to increase high-efficiency leaf area rate and effective leaf area rate to increase panicle bearing N moderately.

关 键 词：比例 茎蘖动态 成穗率 叶龄 干物质积累量 叶面积指数 

分 类 号：S147.21[农业科学—肥料学]