排灌机械工程学报2016，Vol.34Issue(11)：995-1002,8.DOI:10.3969/j.issn.1674-8530.16.0091
调亏灌溉和氮处理对小桐子生长及水分利用的影响
Effect of regulated deficit irrigation and nitrogen nutrition on growth and water use efficiency of Jatropha curcas L.
摘要
Abstract
To explore effects of regulated deficit irrigation and nitrogen nutrition on growth and water use efficiency of Jatropha curcas L.,a set of pot experiments are conducted at four water levels (WL WH,WHWL ,WL WL ,WHWH )and three nitrogen levels (NZ:0,NL:0.2 g/kg,NH:0.4 g/kg).It is shown that the growth and irrigation water use efficiency at WL WH levels are significantly higher than WHWL .With increasing nitrogen level,the irrigation water use efficiency shows a maxi-mum value at NL level.Compared with NHWHWH,the height,total dry matter and irrigation water use efficiency are decreased by 31%,35% and 13%,irrigation water is saved by 27%,and nitrogen fer-tilizer dosage is reduced by 50% ,respectively,at NL WL WH levels,but the plant stem diameter,root-shoot ratio are increased by 13% and 20%.In the first stage of growth (40 -90 d),less water is demanded,moderate deficit irrigation can improve the irrigation water use efficiency.In the second stage of growth (90 -140 d),more water is on demand for vigorously growing,increasing irrigation water can promote plant growth and dry matter accumulation greatly.Even though a deficit irrigation in the whole growth period can improve the ability to adapt to the environment,the plant production de-creases.After a comprehensive analysis,NL WL WH is the best irrigation and nitrogen fertilization scheme under arid area conditions for Jatropha curcas L.关键词
小桐子/调亏灌溉/氮营养/土壤含水率/灌溉水利用效率Key words
Jatropha curcas L./regulated deficit irrigation/nitrogen nutrition/soil water contents/irrigation water use efficiency引用本文复制引用
李婕,杨启良,徐曼,贾维兵,雷龙海,徐天宇,刘小刚..调亏灌溉和氮处理对小桐子生长及水分利用的影响[J].排灌机械工程学报,2016,34(11):995-1002,8.基金项目
国家自然科学基金资助项目（51379004）；云南省应用基础研究面上资助项目 （）
