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1试验概况南通崇川水利科学研究所油菜需水量试验,是采用水量平衡法,在6个15m2测坑(蒸渗器)中进行。测坑长5m,宽3m,土层深2m,底部有塑料滤管和细石、黄砂、棕皮过滤层,以利供排地下水。设计控制地下水埋深有0.6m、0.9m、1.5m,处理重复2次。应用浮球开关从计量供水箱中自动供水,
1 Test Profile Nantong Chongchuan Institute of Water Resources rape water demand test is the use of water balance method, measured in the 6 15m2 pit (steam infiltrater). Test pit length 5m, width 3m, deep soil 2m, the bottom of the plastic filter and fine stone, yellow sand, brown leather filter layer, in order to facilitate the supply and drainage of groundwater. Design control groundwater depth of 0.6m, 0.9m, 1.5m, treatment repeated 2 times. Application of float switch from the measurement of water supply tank automatically,