The paper researched on the influences of different film-hole irrigation schedules on soil water content,yield,and water use efficiency in corn field.The result indicated that the yields are similar for the irrigation quotas of 4 500 m~3/hm~2 and 5 400 m~3/hm~2,but the water use efficiency of the former is higher than that of the later.When irrigation quota decreased to 3 600 m~3/hm~2,yield is lower than the others,but its water use efficiency is the highest,with the water productivity of 2.727 3 kg/m~3.Therefore,it could save much more water than the others.In the region,the optimal economic benefit can be obtained if irrigation quota is 4 500 m~3m~3/hm~2 and irrigation at four times.Compared with ordinary irrigation,film-hole irrigation has great effects in increasing yield and water use efficiency.

Based on the characteristics of film hole irrigation,by making use of the results of orthogonal experiment,this paper analyzed water use efficiency and water consumption rule of spring corn under film hole furrow irrigation,and educed water consumption coefficients of film-mulched spring corn in different growing periods,so as to provide theoretical and technical basis to the widespread application of film hole furrow irrigation.

该文依据膜上灌水技术室内外试验数据,分析探讨了膜上灌水对作物生长要素中土壤水、肥、气、热环境的影响.研究结果表明:膜上灌水技术与传统的沟畦灌相比,地膜覆盖灌水法在减少地面蒸发,实现节水的同时,可调节土壤温度,减少灌溉水的深层渗漏和保持土壤肥力,提高了水分利用率,增加作物产量.膜上灌水不仅节约用水,同时也为作物的生长发育创造了适宜的根部生态环境.

AbstrcatThe film bore irrigation technique is a new irrigation technique.Based on the ground film and cultivation technique,the technique uses the ground film to transfer water by preventing water evaporation from ground soil.This paper describes the present research status,characters,water saving mechanism,problems and solutions in practice of the film bore irrigation technique and provides theoretical and practical references in the field.