摘要
研究了旱地棉花不同生育期补水对棉花生长发育和产量的影响．试验结果表明，有限补水棉花根系伤流量提高３７．５％～５６．３％，干物质和叶面积增多，光合势和净光合率提高，叶绿素含量提高２９．８％～４７．１％。补水比不补水棉花产量增加２２．０％～１８３．８％，其中补水３次＞２次＞１％＞ＣＫ，不同干旱年型，有限补水关键时期不同，在前期干旱年型补蕾水，后期干旱年型补花水，补１水（蕾或花）棉花产量过７５０ｋｇ·ｈｍ￣（－２），补２水产量（底＋花或蕾＋花）过１１２５ｋｇ·ｈｍ￣（－２）。
The experiments were conducted from 1994 to 1995 to study the effects of lim- ited water supplement on the growth and yield of cotton in dryland area. The flowing sapincreased 37.5%～56.3%,chrophyll content increased 29.8%～47.1%,dry matterweight and leaf areas increased,and lint yield increased 22.0%～183.8%comparised withno water supplement The key stage of water supplement in cotton were different in differ-ent years,square stage was for earlier dry growing season years and flowering stage forlater dry growing season years.The cotton lint yield can be gained more than 750kg·hm-2 by irrigated once in square or flowering stage and 1500kg· hm-2 by irrigated twice inpresowing+flowering stages or square+flowering stages.
出处
《棉花学报》
CSCD
北大核心
1996年第5期265-268,共4页
Cotton Science
关键词
旱地
棉花
有限补水
产量
cotton limited water supplement yield dryland
