论文部分内容阅读
依兰县团山子灌溉试验站地处三江平原西部,属寒冷稻作区,灌溉控制区域为倭肯河水系三合干渠,海拔高程113米。团山子乡年降雨量不足500毫米,冻土深度旱田为1.8米,水田1.4米,水体冻层可达1.08米,年结冻期140天,无霜期137天(9月下旬至翌年5月上旬)。示范地为黑壤土,水稻根系区土壤总空隙度54％,干容重1.2,比重2.61,容积饱和含水率54％,重量饱和含水率为45％。2004年春,团山子灌区试验站开始了控制灌溉的推广应用。一年的实践证明,水稻实行控制灌溉后效益显著。
Yilan County, Tanshanzi irrigation experimental station is located in the western Sanjiang Plain, a cold paddy area, irrigation control area for the Woken River tributary, elevation 113 meters. The annual rainfall in Tuan Shan Zi Township is less than 500 mm, the depth of permafrost is 1.8 meters, the paddy field is 1.4 meters, the water layer can reach 1.08 meters, the annual freezing period is 140 days, and the frost-free period is 137 days (from late September to early May the following year) . Demonstrated as black loam soil, the total root porosity of rice root region 54% of the total porosity, dry bulk density of 1.2, the proportion of 2.61, 54% of the volumetric saturated water content, saturated water content of 45% weight. In the spring of 2004, the experimental station of Tanshanzi Irrigation District started to popularize and control the irrigation. One year’s practice has proved that the benefits of rice after controlling irrigation are significant.