论文部分内容阅读
一、水纲稻田地的特点1.地形半坦、开阔:水纲稻田地带,一般无山地、丘岭,多为平原,地势低洼,水源充足,尤其随着我国农业建设的发展,为了扩大耕地面积,适应机器耕作,稻田地中的坟墓、土丘及高低不平的地形,实现或将要实现平整,这样水纲稻田地就更显得平坦、开阔了。 2.稻田地带河流渠道繁多:为了便于农作物的灌溉,近年来大力兴修水利,开辟了更多的河流、渠道,这样就将稻田形成了交错的水纲地带。根据潮汕平原澄海县的调查,其水利灌溉体系,每一片(片的大小依地形而不同,一般在数千亩以上)的渠道分:干、支、斗、农四级。干的开端为入水口,
First, the water features rice paddy terrain 1 terrain semi-open, open: paddy water area, generally non-mountain, Qiu Ling, mostly plain, low-lying, adequate water, especially with the development of China’s agricultural construction, in order to expand the arable land Area, adapt to machine farming, tomb in the rice fields, mounds and rugged terrain, to achieve or will be flattened, so that the paddy field of water level more even more flat and open. 2. The rivers in the paddy fields have many channels: In order to facilitate the irrigation of crops, water conservancy has been vigorously built in recent years and more rivers and channels have been opened up, thus forming a staggered watercourse zone in paddy fields. According to the survey of Chenghai County, Chaoshan Plain, the water irrigation system, each piece (the size of the film according to the terrain and different, usually in the thousands of acres or more) channels: dry, branch, bucket, farm four. The beginning of the dry inlet,