摘要
根据目前农民小麦增施氮肥的严重情况,进行小麦氮肥适宜量、控释氮施用量及控释氮比例(CNR)的定位效应研究。结果表明:在磷肥、钾肥施用量一定的情况下,豫东潮土小麦适宜施氮量在210~285 kg hm-2之间,以施氮285 kg hm-2小麦产量和效益最高;小麦产量随CNR的增加而增加,以CNR为40%施氮量210 kg hm-2处理的最高;小麦氮素吸收指数和氮肥偏生产力均随着施氮量的增加而降低,随CNR的增加而增加,以55%的控释低氮处理最高;随施氮量的增加土壤中速效氮和有效磷含量逐渐增加,土壤有效磷随CNR的增加而增加。两年三季作物的经济效益以处理2效益最好,这说明添加有机肥的配方肥比较适合高产、高效农业的需求。
Based on the serious situation of peasants increasing N application, the proper N application, controlled released N application and controlled released N ratio(CNR) were investigated. The results showed that the proper N application to soil of Henna east was between 210 kg hm-2and 285 kg hm-2at the same applications of phosphorus and potassium. Furthermore, the wheat yield and economical effect were highest when the N application was 285 kg hm-2.The yield of wheat increased with the increase of CNR, and it is highest when CNR was 55% and N application was210 kg hm-2. The nitrogen harvest index and nitrogen partial factor productivity decreased with the increase of N application, but increased with the increase of CNR, and they were the highest when CNR was 55% and N application was 210 kg hm-2. Soil available N and P were increased with the increase of N application. Soil available P also increased with the increasing of CNR. The overall economic return of wheat and corn in the treatment 2 was best,which explained specific fertilizer added organic fertilizer adapted to the demands of high yield and efficiency agriculture.
出处
《土壤通报》
CAS
CSCD
北大核心
2015年第3期682-686,共5页
Chinese Journal of Soil Science
关键词
小麦
施氮量
控释氮比例
产量
效益
Wheat
N application
Controlled released N ratio(CNR)
Yield
Effect
