行间覆膜节水技术在黑龙江省西部半干旱区集雨作用的研究

Study on the effects of catching rainwater with saving water technology of covering film between furrows in western semi-arid area of Heilongjiang province

考虑行间覆膜对降雨再分配的影响,以甘南县资料为例研究了行间覆膜节水技术的集雨效果,集雨作用的大小与覆膜宽度和自然降雨量有关,覆膜宽度为60cm^80cm情况下,自然降雨在5 mm^15 mm范围内,膜旁15cm宽的苗带上实际得到的雨量是原降雨量的2.1~3.2倍。在春季雨水偏少的年份或是有喷灌条件的地块上,行间覆膜能很好地发挥其集雨作用。表4,参3。

Considering the allocation rainwater effect of coveting fill between furrows, the article takes data of Gannan county as an example studied the catching rainwater effect of saving water technology with covering film between furrows. The catching rainwater effects relate to the width of covering film and natural rainfall intensity. When the width of covering film is 60cm - 80cm, natural rainfall intensity is at 5mm - 15mm, the pant belt beside 15cm of covering film remained rainwater can be 2.1 - 3.2 times of rainfall.When less water in the Spring season or the sprinkler irrigated land, the covering film between furrows can catch rainwater eficiently.