北疆高产棉田水热平衡的初步研究

Primary Study on Water and Heat Balance on High-Yield Cotton Field in North Xinjiang

通过对高产棉田和普通棉田的生长状况、植物和土壤水分平衡与热量平衡的研究 ,提出在沙壤地的普通棉田 ,采用“轻灌勤灌”的灌溉方法 ,是改善棉田水热平衡 。

Plant growth, water and heat balance in cotton field are investigated and analyzed. Research results indicated that higher transpiration rate and lower stomatal impedance are beneficial to water absorption and CO 2 metabolization. Plant temperature should be lower than ambient air temperature in order to avoid heat injury. Higher transpiration rate, lower stomatal impedance and the balance between water and heat are basal conditions for high yield in cotton. Frequent and insufficient irrigation are effective to improve the balance of water and heat in sandy soil.