渭北旱塬西部春玉米产量与耗水量关系研究

研究表明,在试验年份及所给条件下,不同水分处理对产量的影响达显著水平,不同水分水平处理下的耗水量与产量间存在着抛物线型关系,这种关系既在高肥条件下存在,也在低肥条件下存在,而相对耗水量与相对产量的关系在不同肥力条件下是一致的,即:yy=-4.292+10.586xr-5.293xr~2式中yr:相对产量;xr:相对耗水量.

A STUDY ON THE RELATIONSHIP BETWEEN SPRING CORN YIELDS AND CONSUMPTIVE USE OF WATER IN THE WEST OF WEI-BEI RAINFED TABLELAND

Based on the data of field experiments in Changwu County, located in the west of weibei tableland, this paper deals with the relationship between corn yields and consumptive use of water. The preliminary studies showt1. There is a significant difference at 1 percent level for corn yields among different treatments of water supply.2. At various level of water treatments, there is a parabola relationship beteen yields and consumptive use of water.3. Under different fertility levels, the relationships between relative crop yields and relative consumptive use of water are identical, that is, Yr =-4.292+10.586Xr-5.293Xr~2 where Yr—relative crop yields Xr—relative consumptive use of water