论文部分内容阅读
近年来我省水资源严重短缺,粮棉争地矛盾十分突出,为此,麦套短季棉得到发展。现将麦套短季棉的节水灌溉简述如下: 一、需水规律 1、全生育期需水量。1991—1993年为平水偏旱年,短季棉全生育期降水平均364.9毫米,其间只灌提苗水的,每亩籽棉产量160—180公斤,需水量420.41—470毫米,水分生产率为0.365—0.38公斤/毫米,灌提苗、现蕾两水的,亩产160—230公斤,水分生产率为0.46公斤/毫米,灌提苗、现蕾、吐絮三水的,亩产130.98—219.61公斤,需水量466.3—617毫米,水分生产率0.28—0.36公斤/毫米。由此可见,短季棉亩产在160—230公斤情况下。需水量为450—500毫米,一般年份在灌好提苗水的同时,可酌情浇好蕾水或初花水。
In recent years, a serious shortage of water resources in our province, the conflict between grain and cotton dispute is very prominent, therefore, wheat short-season cotton development. Now wheat short-season cotton water-saving irrigation is summarized as follows: First, the law of water demand 1, the whole growth period water demand. 1991-1993 years of flat water partial dry year, the short season cotton average growth period average 364.9 millimeters of precipitation, during which only filling seedling water, per acre seed cotton yield 160-180 kg, water 420.41-470 mm, water productivity was 0.365- 0.38 kg / mm, filling seedlings, budding two water, 160-230 kg per mu, water production rate of 0.46 kg / mm, filling seedlings, budding, bolting Sanshui, per mu 130.98-219.61 kg, Water 466.3-617 mm, water productivity 0.28-0.36 kg / mm. This shows that the short-season cotton yield in the 160-230 kg case. Water demand is 450-500 mm, the general year in the filling of seedlings water mentioning at the same time, may be appropriate to pour a good bud or early flowering water.