加气渗灌模式下灌水定额与棉秆还田深度对棉花生长及产量的影响

Effects of Irrigation Quota and Cotton Straw Returning Depth on Cotton Growth and Yield Under Aerated Infiltration Irrigation Mode

为了探究加气渗灌模式下灌水定额和棉秆还田深度对棉花生长和产量的影响,本文以新陆中88号为研究对象,探究灌水定额和棉秆还田深度对棉花株高、茎粗、干物质量以及叶绿素相对含量的调控效应。结果表明,棉花受灌水定额影响较大,植株株高、茎粗、干物质量和叶片叶绿素相对含量均随着灌水定额的增大呈增加趋势。总体来看,在同一灌水定额条件下,25 cm土层处理的叶绿素相对含量大于15 cm和35 cm处理;棉秆还田深度为25 cm时,棉花株高、茎粗以及单株棉花籽棉产量均为最佳。

In order to investigate the effects of irrigation quota and cotton straw returning depth on cotton growth and yield under the aerated infiltration irrigation mode,this paper took Xinluzhong 88 as the research object and explored the regulation effects of irrigation quota and cotton straw returning depth on cotton plant height,stem diameter,dry matter quality,and relative chlorophyll content.The results showed that cotton was greatly affected by irrigation quota,and plant height,stem diameter,dry matter mass,and relative chlorophyll content of leaves all showed an increasing trend with the increase of irrigation quota.Overall,under the same irrigation quota conditions,the relative chlorophyll content in the 25 cm soil layer treatment was greater than that in the 15 cm and 35 cm treatments;when the cotton straw returning depth was 25 cm,the cotton plant height,stem diameter,and seed cotton yield(single cotton)were all optimal.