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Lanzhou Sunada arid northwest China, a unique semi-arid areas, the traditional resistance to early farming methods, is one of the soil cover system. Sunada zone climate of extreme drought and early spring low temperature conditions seriously threaten the the Sunada watermelon production, although the general Tsuchida Sunada the warming soil moisture of the role, but still amounted to less than watermelon yield, quality requirements and therefore need to be The modern agriculture coating technology combined with traditional Sunada warming, soil moisture and rainwater harvesting effect is more obvious coated explore integrated perfect the dry sands watermelon drought resistance and water saving cultivation techniques, and efficient use of local of precipitation resources and increase economic efficiency, to further improve the arid areas Sunada production efficiency. The test carried out in 2009 in Lanzhou Gaolan County, set FM (Sunada tiled full film coverage), RM (Sunada the ridging semi film coverage), HM (Sunada tiled half membrane covering), CK (bare sands) four treatments Sunada watermelon Covering Film lower soil temperature, moisture variation and plant growth and development as the main research content, explore the different coating growth and development of Soil Hydrothermal Condition and watermelon Sunada impact mechanism. The test results showed that: 1. Different Film Mulching in dry the Sunada 0 to 25 cm vertical soil soil temperature diurnal variation showed similar patterns, negative sine curve of temperature wave form of the \Each treatment within 5 cm of soil at the day temperature variations, with the deepening of the soil gradually weakened. Dry sand field with different coating in 0 ~ 25 cm soil layer daily average ground temperature are FM highest, RM and HM differences is not obvious, CK minimum; different growth stages of the average ground temperature, accumulated temperature FM gt; RM gt; HM gt ; CK entire watermelon growing period accumulated temperature FM, RM, HM than CK respectively of 266.83 ° C, 197.49 ° C and 172.54 ° C. In addition to the results of the dry sands of Different Film Mulching watermelon various fertility of soil water content are 0-20 cm soil layer maximum decreased with soil depth less than 20 cm, 100 cm there rebounded. Of watermelon seedling stage and stretched Man of FM and RM showed good soil moisture effects, both 0 ~ 40 cm soil moisture than HM increased by 1.5 percentage points, compared with CK 2 percent. 1m soil water storage FM, RM, HM than CK increased by 6.8 mm, 9.4 mm and 4.6 mm. Watermelon whole growth period 1m soil total water consumption in FM, RM, HM, respectively, compared with CK reduced 6.9 mm, 9.5 mm and 4.7 mm; watermelon production water utilization FM, RM, HM CK 2.8 times, 2.4 times and 2.2 times . 3. Various coating are different degrees to shorten the growth period of the dry sands of watermelon, FM, RM, HM than CK, respectively, 10 days in advance, 8 days and 6 days to mature; than CK to results period, FM, RM, HM watermelon Zhuman, respectively, an increase of 12.7%, 11.5% and 8.8%, respectively; leaf area index than CK respectively increase of 67.77%, 25.62% and 31.41%; stretch the vine-term watermelon leaf chlorophyll content FM, RM, HM than CK respectively 4.26 %, 1.97% and 2.79%, respectively. 4.FM, RM, HM processing watermelon production is 2.5 times that of CK, 2-fold and 1.9-fold; watermelon soluble solids content than CK were increased by 1.12 degrees, 0.76 degrees and 0.26 degrees; edge of total soluble sugars than CK increased by 1.07 degrees, 0.67 degrees and 0.33 degrees; soluble sugar content than CK 1.17,0.68 and 0.38 percentage points respectively; vitamin C content than CK respectively 8.14%, 19.6% and 5.12% respectively. 5 different coating on the absorption and utilization of the dry sands the watermelon nitrogen, phosphorus, potassium and mineral nutrients were higher than the bare sands, FM, RM, HM processing utilization of nitrogen fertilizer season than CK respectively 9.85,6.58,5.26 a points; seasonal utilization of phosphorus than CK respectively 3.70,2.26 and 1.91 percentage points; total potassium uptake by CK 2.52 times, 2.09 times and 1.80 times respectively. , FM, RM, HM processing economic benefits of watermelon are CK's 2.95 times, 2.36 times and 2.42 times. This experiment, dry sands coated watermelon cultivation mode than bare the Sunada exhibit good warming soil moisture, promote plant growth and development, improve the watermelon production and improve the watermelon quality effects, including the FM treatment effect optimal such cultivation model better able to make effective use of the resources of the arid sands area of ??precipitation and increase watermelon economic benefits.
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