秸秆覆盖对滴灌棉花土壤盐分分布的调控影响  

Regulation Impact of Straw Mulch on Soil Salinity Distribution under Drip Irrigation for Cotton

作　　者：张金珠[1] 虎胆.吐马尔白 王振华 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]现代节水灌溉兵团重点试验室,新疆石河子832000

出　　处：《节水灌溉》2012年第7期26-28,共3页Water Saving Irrigation

基　　金：新疆自治区自然科学基金(200821172);国家自然科学基金(51069015);新疆自治区十二五重大科技专项(201130103-3);现代节水灌溉兵团重点实验室开放基金(JSGG2011001)

摘　　要：为探索秸杆覆盖对土壤盐分分布的调控作用,采用测坑试验,设置了表层覆盖、地表下30cm覆盖和无覆盖三种处理进行对比试验研究,结果表明:盐碱土秸秆覆盖后影响了土壤盐分的运移和分布,不同位置秸秆覆盖可以抑制盐分上移,调控盐分在秸秆覆盖层下方的分布。地表下30cm处覆盖秸秆后0～20cm土层盐分含量较低,30～40cm深处土层盐分小幅聚集。地表下30cm秸秆覆盖具有明显的抑制盐分上移作用,且抑盐效果高于表层覆盖。秸秆覆盖能够起到调控盐分分布,在一定程度上改良盐碱土。Three comparison test treatments, namely surface coverage, coverage below the surface 30cm and no coverage, are set upto explore the regulation of straw mulching on soil salinity distribution. The results show that straw coverage on saline-alkali soil can affect the migration and distribution of soil salinity. Different positions of straw mulch can inhibit salt movement and regulate the dis- tribution of salt under the bottom of straw mulch layer. The soil salt content in the 0-20 cm layer becomes lower and the soil salini- ty in 30-40 cm layer slightly gathers under the treatment of coverage below the surface 30 cm. Coverage below the surface 30 cm obviously inhibits the salt upward movement, its effect of suppression salt is higher than that of surface coverage. Straw mulch can regulate the salt distribution and improve the quality of saline-alkali soil in some extent.

关 键 词：棉花 滴灌 秸杆覆盖 土壤盐分分布 

分 类 号：S275.6[农业科学—农业水土工程]