摘要
以杂交中籼稻Ⅱ优2027和36优959为材料,在施氮量240 kg/hm2条件下,研究氮肥运筹方式对杂交水稻产量及构成因素和干物质积累的影响。结果表明,水稻产量、干物质积累随氮追肥用量的合理提高而增加,但后期施氮比例过高则不利于产量、干物质积累和形成良好的构成因素。氮肥运筹以4∶3∶3(基肥∶分蘖肥∶穗肥)较为合理,两个水稻品种产量最高,分别达8314.8 kg/hm2和9399.5 kg/hm2。干物质积累和根干重最高,生育后期干物质积累强度最大。
Methods of field experiment were employed to study the effects of nitrogen apphcafion on dry matter accumulation and yield of hybrid rice. The test crop varieties were Ⅱ you 2027 and 36 you 959 medium indica hybrid rice and N fertilization was 240 kg/hm^2. The results showed that yield and dry matter accumulation of hybrid rice could raise due to increasing N topdressing rate properly. When ratio of base application, topdressing at tiUering and heading stage was 4 ： 3 ： 3, two hybrid rice could achieve maximum yield of 8314.8 kg/hm^2 and 9399.5 kg/hm^2, respectively, dry matter accumulation, dry weight of root and dry matter accumulation intensity at late growth stage could reach the highest.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2008年第2期31-34,共4页
Soil and Fertilizer Sciences in China
基金
国家及安徽省粮食丰产项目“安徽麦稻高效生产条件下养分资源运筹技术研究”课题部分研究内容
关键词
杂交水稻
氮肥运筹
产量构成因素
干物质积累与分配
hybrid rice
nitrogen application
yield component
accumulation and distribution of dry matter
