小麦/玉米一体化氮肥运筹对矮抗58产量的影响

Effects of Nitrogen Applications in Wheat/Maize Integration on AK58 Yield

为研究小麦/玉米一体化条件下周年氮肥用量及其分配比例对冬小麦群体生长及产量相关性状的影响,以矮抗58为材料,周年氮肥用量设300,450,600 kg/hm^2共3个水平,小麦、玉米间的氮肥分配设4∶6,5∶5,6∶4共3个比例。结果表明,在一定氮肥施用范围内,冬小麦群体数量与氮肥水平呈正相关,全年总产量与当前麦季氮肥施用水平间存在极显著正相关。当小麦季施氮量超过240 kg/hm^2时,拔节期之后群体数减少、干物质量降低、小麦及全年产量下降。全年施氮肥450 kg/hm^2以及小麦、玉米间的氮肥为5∶5的分配比例有利于矮抗58及全年高产。

To explore growth and yield variation law of wheat under the condition of wheat/maize integration, anniversary amount of nitrogen application and distribution, this paper took AK58 as material, wheat/maize two cropping system anniversary amount of nitrogen application set three levels of 300, 450, 600 kg/hm2, nitrogen distribution set three proportion of 4 ： 6, 5 ： 5 and 6 ： 4. The results showed that the nitrogen application was positively related to winter wheat quantity of population, the annual total yield increased significantly with the nitrogen application of wheat season in certain range. While the wheat nitrogen fertilizer exceeded 240 kg/hm2, the wheat population and the dry matter reduced after jointing stage, the yield of wheat and the annual total yield decreased. The application of anniversary amount of wheat/maize nitrogen fertilizer 450 kg/hm2 and 5 ： 5 ratio beneficial increased to the yield of AK58 and the annual total yield.