徐州地区小麦有效潜水蒸发规律浅析

农作物生长所需要的水源主要为生长期的降水,由地下水补给的潜水蒸发和人工灌水,在潜水埋深较小的地区,潜水蒸发对农作物的影响很大。本文利用汉王水资源试验站的资料,通过对小麦在不同潜水埋深,不同生长季节情况下的潜水蒸发和有效降水灌溉量的分析,得出了小麦在不同时期的需水量、潜水蒸发量以及全生长期的有效潜水蒸发系数,从而可以有目的地确定灌溉时期和水量,充分利用地下水,节约地表水资源。

A PRIMARY ANALYSIS ON ANAILABLE GROUNDWATER EVAPORATION OF WHEAT IN XUZHOU

The water rcsours needed by crop come mainly from pricipitation, groundwatcr evaporation and irrigation. In areas where the groundwatcr depth is shallow, the groundwatcr evaporation affect the growth of crop greatly. Based on the analysis of groundwatcr evaporation and available precipitation and irrigation water during various period, this paper analyses the available groundwatcr evaporation coefficient as well as the amount of water needed by wheat in different season. So we may determine the time and the amount of irrigation, make full use of groundwatcr, and practise surface water rcsours.