Studies on Rationalization and Practicaltiy of Sandponics Vegetable Cultivation System in Arid Area

瓜简历。采用12个沙土栽培床（W60cm L10m D7cm）进行栽培。每床采用微管式滴灌软管灌溉，覆盖3种地膜材料；黑色、白色和银色聚乙烯薄膜效果最好。黑膜对甜瓜植株生长有促进作用，黑膜含糖量最高，达14.7%。与普通栽培方法相比，snadonics可节约灌溉用水约80%。测定了不同气象条件下的蒸腾、光合作用、水分利用效率、叶片电导和细胞间<CO_2>浓度。空气温度、相对湿度（RH）和光照强度。

Melon cv. Bonasu was cultivated by 12 Sandponics bed (W60cm L10m D7cm) systems. Each bed was irrigated by microtube type drip hose and was covered by the three kinds of mulching materials; black, white and silver color polyethylene film showed the best effects. The growth of melon plants improved with black film, and the sugar content of black film showed the highest value of 14.7%. Snadponics was able to save irrigation water ca.80% compared with a common cultivated method.Transpiration, photosynthesis water use efficiency, Leaf conductance and intercellular <CO_2> concentration were measured under several kinds of meteorogical conditions.i.e., air temperature, relative humidity (RH) and light intensity.