盐渍化土壤优化磷配比下施氮水平对土壤水盐及产量的影响

Salinization of Soil Under the Optimal Ratio of Phosphorus Nitrogen Levels on the Influence of Soil Water and Salt and Yield

通过田间试验研究了盐渍化灌区基于优化磷配比下不同的施氮水平(N_0、N_1、N_2、N_3)对套作小麦/玉米土壤水盐及产量的影响及它们之间的相关关系。结果表明:在优化磷配比下,套作小麦/玉米土壤含水率、盐分都随施氮水平的提高呈先降低后增加的趋势,N_2P_2处理时土壤含水率、盐分最低;套作小麦/玉米的产量随着施氮水平的提高而先增加后降低,并且N_2P_2处理下的小麦玉米产量最大,合理的氮磷配施(N_2P_2)可以提高作物对水分和养分的利用率,增加作物的产量。施氮水平与土壤含水率之间呈显著负相关(P<0.05),与土壤盐分的相关性为极显著负相关(P<0.01),与产量之间存在极显著正相关关系(P<0.01)。对合理地制定施肥方案,调控土壤水盐含量,实现作物高产稳产,减少环境污染及农业的可持续发展具有一定的指导作用。

The study is based on optimization phosphorus content the influence on the intercropping wheat/corn soil water and salt and yield, and the relationship between them under different nitrogen level （ such as No, N1 , N2 and N3 ） through field experiment on salinization irrigation area. Results show that under optimization phosphorus content, intercropping wheat/corn soil moisture content and salt firstly reduces and then increases with the increase of N application, during N2P2 processing soil moisture content and salt is the lowest; intercropping wheat/corn yield increases and later decreases with the increase of N application, during N2P2 processing wheat maize yield is the largest, these shows that reasonable nitrogen and phosphorus （ N：P2 ） can improve the utilization of water and nutrients by crops, increase crop yield. Between N application rate and soil moisture content was significantly negative correlation （P〈0.05）, and the correlation of soil salt is a very significant negative correlation （P〈 0.01 ）, and there were very significant positive correlation between yield （P〈 0.01 ）. To set the rational fertilization scheme, control soil water and salt content, to achieve high and stable yield crop, reducing environmental pollution and the sustainable development of agriculture has a certain guiding role.