Study On The Efficiency Of High-efficient Cultivation Of Several Vegetables By Collecting Rain Water On The Surface Of Greenhouse In Semi-arid Regions

The paper was based on the experiment which was conducted in the, Rainwater Harvesting with Heliogreenhouse Crop Cultivating Agaricus Bisporus (lange)Sing, cucumber and tomato, Semi-arid Regions Loess Plateau, the experiment station (Dingxi country , Gansu Province), Gansu academy of agricultural science and technology, in 2003²005. The dynamics of soil water, the regular consumption of water, yield and its affected factors, water use efficiency (WUE), water irrigation efficiency (WIE) or economic benefit per cubic water, and output value of various crops were determined. Based on the above items, a catchments-water utilization model for solar greenhouse in the Semi-arid region of precipitation 300mm was proposed.The results of the soil water dynamics curve of cucumber and tomato's growth period a showed that due to influence of irrigation and water consumption, the soil water dynamics appeared fluctuated decrease. But the soil water dynamics of Agaricus Bisporus (lange)Sing appeared as flow: firstly, the content of casing soil water and compost water dynamics appeared the same current at the began of every flush, then they continued increasing with mass of irrigation increased, after that the they keeped stable.The results of yields and its affected factors analyzed of as follow: Under the spring irrigation, to the Agaricus Bisporus (lange)Sing, the weight of per mushroom, the yield and economic benefit per cubic water respectively came to 7g, 90074.2kg/ hm², 242.41yuan/t when the amount of water supplying was 240mm. Under the drip irrigation condition, the amount of water supplying that satisfies the cucumber from the field planting to uproots after harvest was 180mm, this treatment had significant supper in the number of cucumber, yield, and the fruit weight. It's the fruit weight, the yield, and economic benefit per cubic water was respectively197.3g, 147017.3kg.hm^-2 and139.74 yuan/t. Under the drip irrigation condition, to tomato the most propriety amount of water supplying was 285mm. Its sole fruit heavy, the yield and economic benefit per cubic water were respectively 158g, 103995.8 kg·hm^-2, and 72.5yuan/t.The analyze of WUE of each crops as follow: The WUE of Agaricus Bisporus (lange)Sing, tomato and cucumber increased with the amount of water supplying increasing ; then decreased gradually, the maximum value of their WUE was...