| The climatic conditions in Wuhan, through this experimental design to determine a reasonable matrix ratio, the establishment of steam permeability field plot to study the golf course greens nitrogen, phosphate, chlorpyrifos was observed after the leaching patterns of different substrate compositions; reference Standards, probably determine the safe amount of nitrogen fertilizer, phosphate fertilizer and chlorpyrifos for golf course greens.The main results of this study are as follows:①Researched the matrix ratio of the golf greens in the coarse sand, very fine sand and silty clay, peat, soil bulk density of the formula, total porosity, capillary porosity, air, saturated hydraulic conductivity of the qualitative and quantitative analysis, obtained Maximum and minimum physical properties of the corresponding proportion of the scope of the formula factors, such as:bulk density of the formula factors and the regression equation is:y=1.518+0.959X,X2+6.338X1X3-35.910X2X3-98.516X32Contribution of each factor:△1=0.872,△2=0.874,△3=1.943, contribution mainly from the peat, indicating that the formula is mainly affected by soil bulk density content of coarse sand and peat. Mainly affected by soil bulk density formula of peat, with the bulk density increases, the coarse sand content will not significantly increase, 85.5%-97.1% to 87%-98.6%, peat decreased from 5% to 1.2%-1.5%. If you want to get a larger bulk density, coarse sand content range of 87%-98.6%,5% peat content, very fine sand and silty clay at a low level of 5.3%-6.9%.②green grass color, uniformity, coverage, into a flat rate by the most obvious effects of peat; all sand soil formula rate significantly greater than the grass turning green formula containing peat soils.③Matrix formulation of nitrogen, phosphorus and leaching of chlorpyrifos. All Shakey quality than the leaching water with peat substrate detect more fertilizer residues, the maximum concentration of nitrate and total phosphorus were 2.34 mg/L and 0.24 mg/L, but lower than "Surface Water Environment Quality Standard " (GB 3838-2002) of the minimum standards of 10 mg/L and 0.4 mg/L, does not pollute surface water. Leaching of nitrate concentrations in water, total phosphorus concentration and formulation components are quadratic polynomial regression model are:y=3.070-15.307X1X2-55.975X1X3+163.289X2X3+227.757X32y=0.268-0.534X,X2-4.176X1X3+2.528X2X3-8.689X32 The contribution rate of peat is biggest in these regression models, In this study, the highest concentration of ammonia nitrogen leaching concentration of 0.94 mg/L, no more than our current "Surface Water Environmental Quality Standard"(GB 3838-2002) of ammonia nitrogen concentration in surface water did limit 2.0 mg/L, and the reviving of the rapid growth of turfgrass lawn, ammonia concentration Lower the requirements to achieve higher and will not pollute the environment.Only the control treatment in this study to detect the concentration of nitrite was 0.26 mg/L, no other formula of dealing with residual nitrite was detected and would not cause water pollution. To the preliminary conclusion, turning green in the green can be increased on the amount of nitrogen and phosphorus.The results showed that the concerntration of chloryifos was 0, does not exceed the U.S. Department of Health and Welfare to develop a golf course MHW chlorpyrifos residues in drinking water standard (4ug/L), chlorpyrifos 0.61g/m2 in reviving stage application does not cause pollution of surface water. |
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