摘要
从三个方面对非充分灌溉技术体系中土壤水分下限指标进行了讨论:①土壤水分下限的概念;②影响土壤水分下限的主要因素;③土壤水分下限对作物水分生产效率和作物产量的影响。认为研究中存在的主要问题有:土壤水分下限值的研究目前还集中在大田粮食作物及部分经济作物,有关瓜果蔬菜作物的土壤水分下限值有待研究;以往对土壤水分下限值的研究较少考虑到作物的旱后补偿或超补偿效应。
The paper mainly discusses three aspects of the low limits of soil moisture in the research of deficit irrigation. First is what is the low limits of soil moisture, how it comes and why it is important. Secondly, the mainly factors that affect the low limits of soil moisture, such as the kinds of the crops, the growth period of the crops and the soil texture and soil bulk density. Thirdly, the effect of the low limits of soil moisture to the yield of the crops and to the WUE. Some main problems were also discussed as follows, old research about the low limits of soil moisture mostly focused on the food crops and some economic crops, actually the melon and fruit and vegetable crops should be pay more attention. And compensatory effect of plant has not been considered in the research of the low limits of soil moisture.
出处
《干旱地区农业研究》
CSCD
北大核心
2007年第3期227-231,共5页
Agricultural Research in the Arid Areas
基金
国家自然科学基金"半干旱地区农业高效用水的生物学原理及其应用"(KZCX3-SW-444)
关键词
土壤水分下限值
水分生产效率
灌溉指标
非充分灌溉
low limits of soil moisture
deficit irrigation
water use efficiency
irrigation index
deficit irrigation
