干旱区生态环境知识资源中心(Arid): 调亏灌溉条件下紫花苜蓿生长、作物系数和水分利用效率试验研究

Arid

	调亏灌溉条件下紫花苜蓿生长、作物系数和水分利用效率试验研究
其他题名	Growth,Crop Coefficient and Water Use Efficiency on Field-grown Alfalfa under Condition of Regulated Deficit Irrigation
	杨磊 1; 杜太生 2; 李志军 1; 王振昌 1
ISSN	1672-3317
出版年	2008
卷号	27 期号:6 页码:102-105
中文摘要	为了探讨西北旱区饲草作物节水灌溉新途径,在石羊河流域下游民勤干旱荒漠绿洲区大田进行了不同调亏灌溉模式下紫花苜蓿生长、作物系数及水分利用效率试验研究。结果表明,第一茬不同调亏处理最终株高差异不显著,而返青期、分枝期土壤水分下限为55%田间持水量(thetaf)的水分亏缺有利于增加分枝数,而茎粗随灌水量增加而增加。不同处理的耗水强度总体趋势是随着供水量的增加而递增。作物系数(Kc)第一茬随生育阶段逐渐增大,全年Kc随茬次递减。第一茬土壤水分下限55%thetaf的控水处理,有利于后继茬次生长,保证全年总产量最高。在石羊河流域水资源严重不足的情况下,调亏灌溉是一种有效的灌溉方式,在民勤干旱缺水地区苜蓿第一茬土壤水分下限不应低于55%thetaf,第二、三茬土壤水分下限保持(55%～70%)thetaf可以获得较高的产量和水分利用效率。
英文摘要	A field experiment was carried out to study the effects of regulated deficit irrigation on alfalfa growth,crop coefficient and water use efficiency in desert oasis located in the downstream of Shiyang River Basin,Gansu province.The results showed that the differences between the final heights of the first crops were not significantly at the end of first crop growth stage.it could benefited the increasing of branches numbers when the lower irrigation limit was set to be 55%thetaf in the stage of growth stage and branching period.The diameters of stem increased with the increasing amount of water supplied.The overall trend in different treatments was that the rates of water consumption increased with the amount of water supplied.The value of Kc increased with flowing growth stages and decreased with flowing circles of growth.it could benefit the growth of following circle and increase the overall yield of alfalfa in the whole year when the lower irrigation was set to be 55%thetaf in the first circle of growth.It can be concluded that: regulated deficit irrigation in the oasis where water resource is scarce is an efficient irrigation method,and it could increase the yield of alfalfa as well as the water use efficiency in the condition of that the lower irrigation limit was set to be not less than 55%thetaf in the first circle of growth and(55%～70%)thetaf in the second and third circles.
中文关键词	调亏灌溉 ; 紫花苜蓿 ; 生长 ; 作物系数 ; 水分利用效率
英文关键词	regulated deficit irrigation alfalfa growth crop coefficient water use efficiency
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURAL ENGINEERING
WOS研究方向	Agriculture
CSCD记录号	CSCD:3461569
来源机构	西北农林科技大学 ; 中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222496
作者单位	1.西北农林科技大学, 旱区农业水土工程教育部重点实验室, 杨凌, 陕西 712100, 中国; 2.中国农业大学中国农业水问题研究中心, 北京 100083, 中国
推荐引用方式 GB/T 7714	杨磊,杜太生,李志军,等. 调亏灌溉条件下紫花苜蓿生长、作物系数和水分利用效率试验研究[J]. 西北农林科技大学, 中国农业大学,2008,27(6):102-105.
APA	杨磊,杜太生,李志军,&王振昌.(2008).调亏灌溉条件下紫花苜蓿生长、作物系数和水分利用效率试验研究.,27(6),102-105.
MLA	杨磊,et al."调亏灌溉条件下紫花苜蓿生长、作物系数和水分利用效率试验研究".27.6(2008):102-105.