摘要
不同水分状况形成不同生态环境的稻田,直接、间接影响水稻的生长发育。水稻在淹水灌溉条件下生育良好,因淹水土壤生长的水稻,叶子表皮内出现‘硅质气孔’,淹水灌溉使根丛内的空隙度增加,减少根间水流动的阻力,从而增进根吸收矿质元素,促进茎秆生长。但淹水灌溉对稻根系生理功能也有不利影响,
The hybrid rice 'Weiyou 64' is used for the trial experiment with four soil-water treatments: paddy ridge cuiture with infiltration (PI), horizontal culture with continuous flooding(CF), alternate flooding(AF) and no flooding(NF). The results indicate that the leaf area index, net photosynthetic rate, bleeding sap, percentage of stored material translocation in stem and sheath, dry weight of shoot and yield in PI are much higher than those in CF, AF and NF. The ecophysiological effects of heat balance and soil mineral nutrients in PI are also investigated and described in detail in comparison with other three treatments.
出处
《生态学杂志》
CAS
CSCD
北大核心
1991年第5期12-15,45,共5页
Chinese Journal of Ecology
关键词
水稻
稻田
水分状况
生态
生理
paddy field, ecophysiology, water equilibrium, heat balance.
