摘要
对春棉利用含盐量3 8g/L浅层地下微咸水及1 2g/L深井水进行膜下滴灌、无膜滴灌、覆膜畦灌及无灌溉田间对比试验,结果表明:1 2g/L膜下滴灌皮棉产量最高,其次为3 8g/L膜下滴灌,相差22%;两种灌溉水的无膜滴灌及覆膜畦灌4个处理的皮棉产量基本持平,无灌溉产量最低.3 8g/L微咸水灌溉条件下,膜下滴灌比覆膜畦灌增产38 6%,比无膜滴灌增产40 1%,比无灌溉增产92 5%.滴灌比覆膜畦灌省水60%左右,滴头的湿润半径能达到20cm左右,湿润深度能达到60cm左右;试验期间0～60cm土层土壤盐分含量低于0 2%,不会对棉花生长产生危害.
Some experiments were performed under four irrigation conditions for cotton fields, i.e. the mulched drip irrigation, the mulched furrow irrigation, the unmulched drip irrigation, and nonirrigation, with two kinds of irrigation water, i.e. 38?g/L brackish water and 1.2?g/L deep well water. Some conclusions are drawn: the cotton yield from the mulched drip irrigation with 1.2?g/L deep well water is the highest, and the next is from the same irrigation mode with 38?g/L brackish water, the difference being 22%; the cotton yields from unmulched drip irrigation and mulched irrigation with two types of irrigation water are almost the same; the yield of cotton in the absence of irrigation is the lowest. The results also show that, with 38?g/L brackish water, the yield from the mulched drip irrigation is 38.6% higher than that from the mulched furrow irrigation, 40.1% higher than that from unmulched drip irrigation, and 925% higher than that in the absence of irrigation, and that compared with the mulched furrow irrigation, the drip irrigation can save about 60% of water, the wetted radius at each drip can reach 20?cm, and the wetted depth can reach 60?cm. The soil salinity at the depth of 0～60?cm is less than 0.2%, which is harmless to the growth of cotton.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2003年第2期140-143,共4页
Journal of Hohai University(Natural Sciences)
基金
农业部"948"基金资助项目(961048)
关键词
鲁北
盐渍土
棉花
微咸水
滴灌
膜下滴膜
saline soil
cotton
brackish water
mulched drip irrigation
