紫花苜蓿花前蒸腾系数及紫花苜蓿和玉米经济产量耗水系数比较

Alfalfa's Pre-blossoming Transpiration Coefficients and Comparison of the Water Consumption Coefficients Between Alfalfa and Maize in Terms of Economic Yield

探讨苜蓿花前与全生育期蒸腾系数的差异,对苜蓿和玉米经济产量耗水系数进行比较。结果表明,苜蓿花前蒸腾系数约为全生育期的1/2;苜蓿经济产量耗水系数为400～620,玉米为400～600。据此提出加强苜蓿花前需水规律研究的建议。

A comparison of the different of alfalfa's transpiration coefficients between the pre-blossoming and the whole growth stage and the water consumption coefficients of alfalfa and maize in terms of economic yield were made. The results show that the pre-blossoming transpiration of alflfa is about half of that of the whole growth stage. The water consumpation coefficients of alfalfa on economic yield was 400 to 620,while the maize was 400 to 600. According to the above results,we suggest that further study on alfalfa's pre-blossoming water requirement regulation be focused.