论文部分内容阅读
“天上黄河富宁夏”,就是指宁夏地区有着黄河自流灌溉这样得天独厚的自然条件。黄河水经十数条灌渠供给农田,农田排出的水又经纵横交错的大小排水沟汇入排水主干沟再流入黄河。宁夏被称为“塞外江南”,独特的黄河自流灌溉优势使其成为大西北的主要产稻区。黄河水中本身就带?
“Heaven and the Yellow River Fu Ningxia” refers to the Ningxia region has the Yellow River gravity irrigation so unique natural conditions. The Yellow River water supply to the farmland through the ten irrigation ditches, farmland discharge of water after the criss-cross the size of the drainage ditch into the main drainage ditch and then into the Yellow River. Ningxia is known as the “Great Wall beyond the Great Wall,” and the unique advantage of the gravity flow of the Yellow River makes it the major rice producing area in the northwest. Yellow River water itself?