摘要
通过田间小区试验,研究了不同氮磷水平的配合施用对春玉米氮、磷、钾养分吸收状况以及产量的影响。结果表明,在氮肥施用量为300～600kghm-2的范围内,随着施氮量的增加,玉米对氮、磷、钾素的吸收均增加,以处理N3P2的效果最为明显。与对照相比,氮、磷、钾素的总吸收量分别增加13.8%、14.4%和23.2%,氮、磷、钾的养分收获指数最大分别0.649、0.399和0.152。增施氮磷肥均能促进玉米产量的增加,增产幅度为8.2%～15.5%,磷肥的增产效果没有氮肥明显。每生产100kg玉米籽粒,适宜氮磷钾的养分吸收量分别N:2.56kg,P2O5:0.77kg和K2O:2.53kg,植株吸收养分适宜比例(N:P2O5:K2O)为3.33:1:3.29。
In this paper, a field experiment was conducted in Gansu to study effects of applying maize different nitrogen and phosphorus fertilizer on maize N, P and K nutrient uptake and yield. The main results were as follows. Within 300 - 600 kg hm^-2 of N fertilizer, application of N increased N, P and K uptake in maize, but the treatment of N3P2 had a more pronounced effect, which increased by 13.8%, 14.4% and 23.2% in N, P and K total uptake and increased by 0.649, 0.399 and 0.152 per cent on the harvest index of N, P and K. Applying N, P and K could improve the yield of maize, which increased by 8.2% - 15.5%. The effect of nitrogen was better than phosphorus fertilizer. The amount of N, P and K required for the production of 100 kg maize yield were 2.56 kg, 0.77 kg and 2.53 kg. The rational ratio of N： P205：K20 absorbed by maize was 3.33：1：3.29.
出处
《土壤通报》
CAS
CSCD
北大核心
2009年第5期1135-1138,共4页
Chinese Journal of Soil Science
