论文部分内容阅读
目前我国特早熟棉区包括山西、陕西、新疆的部分棉田、辽宁和甘肃省的全部棉田。全棉区棉田面积300多万亩,分布极不集中。我国棉区原划分为黄河流域、长江流域、特早熟、西北内陆和华南五个类型不同的棉区。后来将西北内陆棉区取消,把西北内陆棉区的南疆划归为黄河流域棉区,而北疆和河西走廊划归特早熟棉区。经多年实践证明
At present, China’s especially precocious cotton area includes some cotton fields in Shanxi, Shaanxi and Xinjiang, and all the cotton fields in Liaoning and Gansu provinces. Cotton area of more than 300 acres of cotton fields, the distribution is extremely concentrated. China’s cotton area was originally divided into the Yellow River, the Yangtze River valley, especially precocious, the northwest inland and southern China five different types of cotton. Later, the northwest inland cotton area was canceled, and the southern Xinjiang in the northwest inland cotton area was classified as the cotton area in the Yellow River basin, while the northern and Hexi Corridor were assigned to the early-maturity cotton area. After many years of practice proved