氮肥运筹对粮饲兼用玉米群体质量与产量的影响  

Effect of the nitrogen application on the population yield and quality of dual-purpose maize

作　　者：马国胜[1] 薛吉全[1] 张仁和[1] 路海东[1] 邰书静[1] 

机构地区：[1]西北农林科技大学农学院玉米研究所,陕西杨凌712100

出　　处：《草业科学》2006年第10期63-67,共5页Pratacultural Science

基　　金：科技部农业科技成果转化资金项目(04EFN217100390);陕西省科技厅农业科技攻关重点项目(2003K02-G1;2004K01-G5)

摘　　要：通过粮饲兼用玉Zea mays米陕单310在施氮总量为225.0 kg/hm2的条件下,采用3个施氮时期(苗期、拔节期、大喇叭口期)的不同施氮比例的7种氮肥运筹方式试验,结果表明:0∶10∶0和0∶5∶5的注重中、后期施氮的后重式施氮运筹方式对玉米构建较大的合理叶面积指数和良好的叶系结构效果显著,其花后干物质生产速率高,成熟期干物质尤其是籽粒部分的干物质积累量大,饲用可消化养分产量高,可显著改善群体质量、提高饲用产量和饲用价值。This experiment studied effects of different proportion and application time （three stages, i. e. , seeding, jointing, male tetrad stage） of nitrogen application on population yield and quality of dual-purpose corn Shandan310 at 225.0 kg/hm^2 total N rate. The results showed that the two treatments of 0 ： 10 ： 0 and 0 ： 5 ： 5 laid stress on the nitrogen application at later stage, they could construct a reasonable I.AI and leaf area structure. Moreover, two treatments could maintain higher dry matter production accumulation at post-anthesis, dry matter accumulation and digestible nutrition yields at maturity, which was beneficial to improve population quality, forage yield and feed value.

关 键 词：氮肥运筹 粮饲兼用玉米 群体质量 产量 

分 类 号：S513[农业科学—作物学] S548