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Ningxia Yellow River Irrigation and mountain daylight greenhouse soil test analysis and mathematical statistics method to study the different soil types (irrigated soil, black loam, sierozem), different planting years (1-9 years), different soil layers (0-15cm ,15-30cm ,30-60cm) variation of soil physical and chemical and biological properties, and application of the principal component and gray relational analysis method to conduct a comprehensive evaluation of the greenhouse soil fertility status of the tested The main results are as follows: 1, different soil types and different levels of solar greenhouse soil properties change in daylight under greenhouse conditions, different soil layers (0-15cm ,15-30cm ,30-60cm) of soil bulk density, porosity, and total salt , pH, organic matter, NPK nutrients, urease, catalase, and nematodes in the soil (irrigated soil, black loam sierozem) there were significant or very significant difference. Irrigated soil bulk density in the 0-60cm depth sierozem large black loam; soil porosity, organic matter, total nitrogen, nitrate nitrogen, total phosphorus, available phosphorus, potassium, slow potassium, the size of the nematode order black loam gt; Irrigated soil gt; sierozem; total salt level of irrigation silt soil gt; sierozem gt; Heilu soil; Heilu soil, sierozem higher pH values, while Irrigated soil lower; nitrogen, urease activity level of hydrogen peroxide, followed by Irrigated soil, black loam gt; sierozem. 0-15cm soil, bacteria, fungi number followed by irrigation silt soil gt; gray calcareous clay gt; Heilu soil, the number of actinomycetes turn the irrigation silt soil gt; the black loam gt; sierozem. Different planting years and different levels of solar greenhouse soil properties change of view from the planting years, with the extension of planting years (1-9), soil bulk density, porosity, full of salt, pH, organic matter, NPK nutrients urease, catalase, and micro-organisms (bacteria, actinomycetes, fungi) number of nematodes overall was parabolic changed by a quadratic equation can be obtained for the test under the conditions of the greenhouse soil indicators up to the maximum planting The life of value. Most of the irrigation district the maximum greenhouse planting years concentrated in the 6.5-9.0 years, the mountain the majority concentrated in the 5.5-8.0 years. Regardless of irrigation areas or mountainous greenhouse soil pH value, organic matter, NPK nutrients, hydrogen peroxide activity of different planting years and different soil depth of the existence of significant forward or very significant difference, but urease activity, nematodes in different planting years difference does not significant. Look at the profile level, regardless of the irrigation district or mountain, regardless of planting years the length of the soil physical and chemical properties (bulk density, pH value) and higher than the lower soil nematodes are upper soil. From the different soil layers (0-15cm ,15-30cm ,30-60cm) 1-9 years, the average annual rate of growth, the irrigation district the average annual growth rate (average soil depth) order for nitrate gt; quick impact phosphorus gt; slow release potassium gt; the available potassium gt; the urease gt; alkaline hydrolysis nitrogen gt; full salt gt; the total phosphorus gt; total nitrogen gt; organic matter gt; nematodes gt; peroxide and catalase gt; porosity; mountain annual average The growth rate of the order full salt gt; the available phosphorus gt; the nitrate gt; full phosphorus gt; urease gt; slowly available potassium gt; Available K gt; nematodes gt; organic matter gt; alkaline hydrolysis nitrogen gt; catalase gt ; total nitrogen gt; porosity. Regardless of the irrigation district or mountainous areas, the average annual growth rate of greenhouse soil porosity minimum. Comprehensive evaluation of soil fertility using principal component and gray relational analysis tested 24 solar greenhouse soil fertility is divided into four and so on: first-class planted three solar greenhouse crop rotation; Second Class and First Class no significant change ; and third-class major the sunlight greenhouse soil even years; four and so when the new greenhouse and soil type sierozem solar greenhouse. And to identify the direction of future fertility the Greenhouse in Ningxia soil, improve soil potassium levels should be considered first; followed by considering the combined application of organic fertilizer, nitrogen fertilizer, phosphate fertilizer, but should pay attention to raising the level of soil deep plowing and management. 4, Soil Fertility correlation between soil organic matter content and total nitrogen, alkaline hydrolysis nitrogen, nitrate nitrogen, total phosphorus, available phosphorus, available K, slowly available potassium content was significant or very significant positive correlation, pH value was a significant negative correlation between salt content. Soil urease activity and total nitrogen, was highly significant positive correlation with organic matter, nitrogen, total phosphorus, slow release potassium content was a significant positive correlation between nitrate content. Over between catalase activity and organic matter, total nitrogen, nitrogen, nitrate content was highly significant positive correlation was significantly positively correlated with total phosphorus, available phosphorus, available potassium.
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