摘要
采用定位观测的方法,探讨了宁南山区马铃薯连作田土壤水分变化规律及其对产量的影响。试验结果表明,试验区内土壤贮水量的年际变化呈正抛物线形变化,春秋高,春末夏初达到谷值。土壤含水量的动态变化主要取决于全年降雨分配和蒸发的平衡过程,整个生育期土壤含水量变化在9.95%～21.6%之间。0—100cm层土壤贮水量与产量之间具有显著的相关性,土壤贮水量与马铃薯产量相关关系最显著的时期为发棵期和结薯期,此时也是马铃薯生长耗水的高峰期,在此期间0—100cm土壤贮水量每增加10mm,产量平均可增加135～270kg/hm2。
Based on the data observed in fixed location,the variation of soil moisture and its influences on potato yield in the mountainous area of South Ningxia Hui Autonomous Region was investigated.Experimental results indicate that the annual variation of soil moisture content presents a positive parabola shape,which is high in spring and autumn and reaches a bottom in early summer.Dynamic change of soil moisture is mainly dependent on the balance process between the seasonal distribution of annual rainfall and evaporation.Dynamics of soil moisture varies from 9.95% to 21.6% in the whole growth period.The soil moisture content in 0—100 cm soil layer is most remarkably correlated with potato yield.The most remarkable correlation with potato yield is observed in branching period and fruit period which are the peaks of potato water consumption.In this stage,10 mm increase of soil moisture in the layer may increase potato yield by 135~270 kg/hm2.
出处
《水土保持通报》
CSCD
北大核心
2010年第6期81-85,共5页
Bulletin of Soil and Water Conservation
基金
教育部科学技术重点研究项目"宁夏南部黄土丘陵区马铃薯扩种和连作栽培的土壤生态效应"(208184)
关键词
宁南山区
马铃薯连作
土壤水分
产量
mountainous area of South Ningxia Hui Autonomous Region
potato cropping
soil moisture
yield
