论文部分内容阅读
甘肃是全国最干旱的省份之一,全省旱地面积3 340多万亩,占耕地面积的64%左右,干旱少雨是甘肃农业的主要特征。年降水量300～600 mm的旱作农业主要分布在陇中半干旱区、陇东半干旱及半湿润偏旱区和陇南半湿润偏旱区,农业基础薄弱,自然降水极其贫乏,有效水资源紧缺,干旱严重制约着农业生产的进一步发展。近50年来,甘肃年均旱灾面积约946.5万亩,约占播种总面积的18%,其中成灾面积约为736.2万亩,约占播种总面积的14%。
Gansu is one of the driest provinces in the country. The dry land area in the province is more than 34.4 million mu, accounting for about 64% of the arable land. Drought and drought is the main feature of Gansu’s agriculture. The dry farming with annual rainfall of 300-600 mm is mainly distributed in the semi-arid areas of Longzhan, semi-arid and semi-humid semi-arid areas of Longdong and semi-humid semi-arid areas of Longnan. The agricultural foundation is weak, the natural precipitation is extremely poor, and the effective water resources Shortage and drought severely restrict the further development of agricultural production. In the past 50 years, the annual average drought-affected area in Gansu is about 9,465,000 mu, accounting for about 18% of the total sown area. Among them, the affected area is 7,362,000 mu, accounting for about 14% of the total sown area.