raising of ground water 中文意思是什麼
raising of ground water
解釋
地下水升高-
It is one of the best water - saving irrigation methods that can save water in the highest degree for such advantages as saving water, saving energy, increasing production, raising air temperature and ground temperature inside the shelf, lowering air humidity inside the shelf, decreasing plight and reducing the use of pesticide and chemical fertilizer, etc. but percolation irrigation is far from a ripe irrigation method for the problems existing in the development of pipes for pi and the two difficult problems which hamper the development of pi ( one is the low uniformity degree irrigation, the other is the blockage in percolation irrigation pipes )
它是迄今為止最節水的一種灌水方法，具有省水、節能、增產、提高棚室空氣溫度和地溫、降低棚室空氣濕度、減少病蟲害、少施農藥和化肥等優點。但滲灌還不是一種成熟的灌水方法，滲灌的發展，首先取決于滲灌管的研製；其次是阻礙滲灌發展的兩大難題：滲灌的灌水均勻度和滲灌管的堵塞兩大難題的解決與控制。
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