摘要
试验在专门砌成的池内,用人工控制土壤含水量,测定了土壤贮水的生产能力及油菜的耗水量,当一生供水170mm左右时,油菜可发育至返青;供水250mm,可发育至盛花;供水300mm以上才可获得一定的籽粒产量,此后油菜产量随供水量的增加而提高,当供水量达一定值后,产量即趋于稳定,该值在600-750mm左右,产量为200-230kg/mu。产量的增加不与供水量的增加成正比。在本试验条件下,油菜的耗水系数为3.18-1.49mm/mu·kg,水分生产效率为0.31-0.69kg/mu·mm。
This test under artificial control soil moisture is used to determine the productivity of soil moisture storage and field water consumption of rape by special pond. If soil moisture contents is about 170 mm in whole developement of rape, it can not finish its development process and it can only grow from its sowing to turn green stage. Rape can grow from sowing to full flower stage at 250 mm of soil moisture contents. If soil moisture contents is more than 300 mm, a certain amount of output will be obtained. Hereafter, rape yield can be improved with an increase of storage of soil moisture. If soil moisture storage reach 600-750 mm, rape yield tend to stabilize at 200-230 kg/mu. An increase of rape yield is out of proportion to soil moisture storage. In this case of test, rape water consumption coefficient is 3.18-1.49 mm/mu·kg and moisture production efficiency of rape can reach 0.31 —0.69 kg/mu·mm.
出处
《西北植物学报》
CAS
CSCD
北大核心
1992年第3期231-237,共7页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家自然科学基金
关键词
油菜
产量
土壤贮水量
rape cultivation,artificially-contralled soil moisture storage,water consumption,water consumption coefficient.
