摘要
根据贵州黄壤肥力与肥料效益长期监测的部分试验结果,分析探讨了贵州黄壤旱地玉米氮、磷、钾肥料利用率及肥料效益。结果表明,黄壤旱地玉米氮肥利用率平均为40.6%,氮、磷、钾肥配合施用比单施氮肥其肥料利用率提高6%;磷肥利用率平均为9.3%,在施用氮肥的基础上增施钾肥对提高磷肥利用率效果不大;钾肥利用率很低,平均仅为4.9%,施用钾肥的效果不明显。黄壤旱地玉米1 kg纯氮的增产量平均为16.0 kg,氮、磷、钾肥配合施用比单施氮肥增产2.4 kg,平均提高16.22%;1 kg纯P的增产量平均为17.5 kg;1 kg纯K的增产量平均为2.8 kg。黄壤旱地玉米施肥建议以氮、磷肥为主,钾肥应少施或不施。
The long-term monitoring results of the fertility of yellow upland soil and fertilizer effect showed that the average N utilization rate of maize planted on the yellow upland field was 40.6% and its utilization rate under application of N, P and K fertilizers was 6 % higher than that under single N fertilizer, the average P utilization rate was 9.3 % and its utilization rate under raising K fertilizer based on N application was not improved, and the average utilization rate of K fertilizer was 4.9%. The average increase maize yield of 1 kg pure N fertilizer was 16.0 kg and the yield under application of N, P and K fertilizer was 2.4 kg higher than that under single N fertilizer. The average increase maize yield of 1 kg pure P and K fertilizer was 17.5 kg and 2.8 kg respectively. The application suggestion for maize planted on yellow upland fields is to apply N and P fertilizer.
出处
《贵州农业科学》
CAS
2008年第5期92-94,共3页
Guizhou Agricultural Sciences
基金
贵州省农业科学院重点项目"贵州黄壤肥力与肥效监测"[黔农科合(重点)05003]
"贵州黄壤长期监测基地建设"项目[院2X(2007)010]
关键词
黄壤旱地
玉米
肥料利用率
肥料效益
yellow upland/ield
maize
utilization rate
fertilizer effect
