不同叶龄期追施N、K穗肥对中粳稻产量和群体质量的影响  

Effects of application of nitrogen and potassium at different leaf age periods on yield and population quality of one-season-medium rice

作　　者：陈刚[1] 陈楠[1] 黄义德[1] 张文静[1] 武立权[1] 陈景道 李胜群 

机构地区：[1]安徽农业大学农学院,合肥230036 [2]凤台县水稻良种场,凤台231200

出　　处：《安徽农业大学学报》2009年第3期436-440,共5页Journal of Anhui Agricultural University

基　　金：国家科技支撑计划"粮食丰产工程"(2006BAD02A06)资助

摘　　要：以中粳稻品种皖稻68为材料,研究不同叶龄期追施N、K肥对水稻群体质量及产量的影响。结果表明:(1)倒3叶追施N肥产量最高,各处理之间差异达到极显著水平;倒4叶期追施K肥产量最高,各追肥处理都极显著高于对照。(2)倒3叶期追施N肥显著提高穗粒数,而对有效穗数,结实率,千粒重影响较小;倒4叶期追施K肥显著提高穗粒数和结实率,而对有效穗数和千粒重影响较小。(3)穗肥的合理施用能有效控制无效分蘖生长,提高单位面积总颖花量,并能提高群体的有效叶面积率和高效叶面积率,提高粒叶比,协调群体源库关系,塑造抗倒株型,提高抽穗到成熟期的群体光合生产量而获得高产。Wandao68 was used as material to study the effects of application of nitrogen and potassium in different leaf-age-periods on grain yield and population quality. The results are as follows ： （ 1 ） The output of applying nitrogen at the third leaf age from top and potassium at forth leaf age from top was tiptop and the differences were significant. （2）Applying nitrogen at third leaf age from top could increase grains per panicle significantly while there was little effect on effective panicles per unit area, setting rate and 1000-grain weight;Applying potassium at forth leaf age from top could enhance grains per panicle and setting rate while there was little effect on effective panicle per unit area and 1000-grain weight. （3）Application of ear-fertilizer could control the inefficient tiller growing, increase the number of total spikelets, improve the effective leaf area percentage and high effective leaf area percentage, increase grain-leaf ratio, coordinate the relationship of ear and grain. It also could establish the plant type of resistance to lodging and improve the elevation of photosynthetic efficiency from heading to maturing to achieve high yield.

关 键 词：叶龄期 追肥 群体质量 产量 

分 类 号：S511.22[农业科学—作物学]