摘要
针对彭阳县覆膜玉米氮肥施用量不明确、氮肥利用率低等问题,采用田间试验开展地膜玉米氮肥效应研究,设不施任何肥料,施N肥0、105、210、315、420 kg/hm^(2)6个处理。结果表明:6个处理中,施氮量为315 kg/hm^(2),玉米产量最高,达15038.1 kg/hm^(2),净收益最高,达12507.00元/hm^(2)。通过施肥量与产量相关性分析可知,施氮量为333 kg/hm^(2),玉米产量最高为15225.0 kg/hm^(2);施氮量为306 kg/hm^(2),玉米产量为经济产量,达15186 kg/hm^(2)。氮肥的当季利用率平均为44.8%,每百公斤籽粒吸收氮量平均为1.879 kg。因此,在宁南山区地膜玉米生产中氮肥施用量的适宜范围为306~333 kg/hm^(2)。
To solve problems of unclear application and low efficiency of nitrogen fertilizer in mulching corn in Pengyang County,the field trials were carried out.With the same applications of P2O5 and K2O,N fertilizer 0 kg/hm^(2),105 kg/hm^(2),210 kg/hm^(2),315 kg/hm^(2),420 kg/hm^(2) were applied.Through comparison,the maximum yield of corn was 15038.1 kg/hm^(2) and maximum net income was 12507.00 yuan/hm^(2) with the application of 315 kg/hm^(2) N fertilizer.Through correlation analysis between application rate and yield,the maximum yield of corn was 15225.0 kg/hm^(2) with the application of 333 kg/hm^(2) N fertilizer,and economic yield of corn was 15186 kg/hm^(2) with the application of 306 kg/hm^(2) N fertilizer.The average utilization efficiency of the nitrogen fertilizer at current season was 44.8%,and average nitrogen uptake by 100 kg grain was 1.879 kg.Therefore,the suitable range of nitrogen fertilizer is from 306 to 333 kg/hm^(2) in the production of mulching corn in mountain areas of southern Ningxia.
作者
余慧
Yu Hui(Pengyang County Service Center for Introducing Agricultural Technology,Pengyang,Ningxia 756500)
出处
《宁夏农林科技》
2021年第4期13-15,24,共4页
Journal of Ningxia Agriculture and Forestry Science and Technology
基金
宁夏回族自治区农业科技示范推广项目。
关键词
地膜玉米
氮肥利用效率
产量
适宜施氮量
Mulching corn
Nitrogen fertilizer utilization
Yield
Suitable amount of nitrogen fertilizer
