摘要
采用两因素裂区试验设计,研究了水氮耦合对烟田土壤水分动态变化的影响。结果表明,在灌水量一定的条件下随氮肥用量增加,烟田土壤含水量、土壤贮水量和水分产值率增大,当氮用量达到67.5kg/hm2时开始下降;灌水与氮用量之间存在显著的互作效应,灌水量在225-450m3/hm2范围内,施氮22.5-45.0kg/hm2既可满足烤烟生长的需要又可增强其对土壤水分的利用。
The interaction effects of water and nitrogen on soil water distribution and water use efficiency of tobacco fields were studied by splitting plot design experiment. The results showed that with the increase of nitrogen within the range of nitrogen 0-45.0kg/hm2, the moisture content in soil body and the efficiency of water production value all increased, but decreased when the amount of nitrogen 67.5kg/hm2 were applied .The effects of water and N fertilizers has a rational range, the higher water efficiency and productivity were obtained under the range of nitrogen 45.0-67.5kg/hm2 and irrigation 225.0-450.0m3/hm2 W1N2 treatments was proposed considering both the cost input and the water production efficiency.
出处
《中国农学通报》
CSCD
2005年第4期194-197,共4页
Chinese Agricultural Science Bulletin
基金
国家烟草专卖局基金项目"烤烟优化灌溉理论和技术的研究与应用"(110200302009)
