冬灌白地,适宜在二九到四九期间趁冰封大地漫灌白地。为了顺利进行冬灌。事先必须做好畦埝,根据地形和平整程度,可分为三种:一,地块很平,地身不太长,可打大畦漫灌。就是把地块周围打33厘来高的土埂,进行放水漫灌。二,虽然地块平整,但地身粗长,可分为二段或三段打埂作畦,分段灌水。三,地块不平。要固地分大小不等打埂作畦,保证都能浇透水。不论什么地形,必须在封冻前把畦埝打好、踏实不漏水。实践证明,冬灌益处很多: 1.把余水贮存于耕作层。灌水要适时,过早易 Winter irrigation white land, suitable for filling the land from ice to earth during the period from 29 to 49. In order to smooth winter irrigation. Must be prepared in advance, according to the topography and the degree of formation, can be divided into three types: First, the land is very flat, the ground is not too long, can play big catfish flood irrigation. Is to hit the land around 33% of the soil Tuo, for flood irrigation. Second, although the formation of land leveling, but the body is long and thick, can be divided into two sections or three sections to play 畦, subsection irrigation. Third, uneven land. To solidly divided into sizes ranging from 埂 for 畦, can guarantee watering. No matter what the terrain, must be frozen before freezing, practically watertight. Practice has proved that winter irrigation benefits many: 1. The remaining water stored in the tillage layer. Irrigation should be timely and premature