摘要
选用具有超高产潜力的豫麦 4 9号 ,研究了总施氮量 2 70 kg.hm- 2 时不同氮肥施用时期与比例对小麦干物质积累及产量的影响。结果表明 ,1干物质积累量及日积累量在拔节期以前随底施氮肥比例的增加而增加 ,同时又受追施氮肥的影响。植株地上部干物质日积累量高峰值出现在抽穗～灌浆初期 ;2药隔期追施氮肥 ,可以改善产量性状 ,提高产量。扬花期喷施氮肥 。
The effects of the stage and ratio of nitrogen application on yield and dry matter accumulation of super high yield winter wheat were studied. The six nitrogen treatments were settled in Henan Normal University , using Yumai 49 as the material. The total amount of nitrogen application for all of nitrogen treatment was 270 kg·hm -2 . The results showed that ① In the whole development stage, dry matter accumulation increased. The accumulation and accumulation per day added with the rate of nitrogen based before jointing stage, then added with the applied. The maximum of dry matter accumulation per day appeared the stage from heading to early filling stage; ② With nitrogen applied at anther connective stage, the yield components and grain yield were improved. Nitrogen sprayed to leaves in flowering stage could decrease the number of spikelet unbearing noticeably.
出处
《麦类作物学报》
CAS
CSCD
2002年第2期70-73,共4页
Journal of Triticeae Crops
基金
河南师范大学青年科学基金项目"氮素营养与小麦后期抗衰老关系的研究"(2 0 0 0 0 80 41)
