沙質(zhì)土壤改良劑對沙地改良效果的研究
[Abstract]:Horqin sandy land is one of the four largest sandy land in China. It is one of the most serious desertification areas in the agro pastoral ecotone of China. The land degradation is serious. The wind sandy soil is the main soil type in this area. The soil structure is poor, the leakage of water is serious and the land productivity is low, which seriously restricts the agricultural development in this area. The spatial and temporal changes of soil physical, biological and chemical properties in five years after the soil amelioration, the effect of sandy soil remodifier on the water conservation and the long-term mechanism of sandy land and its long-term mechanism, which provide theoretical basis and technical support for sandy land control in this area and sandy land to good farmland. Research results showed that (1) sandy soil improver improved soil substance. Rational form increased the water retention capacity of the soil, and increased with the increasing age of the modifier. After applying the sandy soil improver, the soil aggregate content of 0.25mm was increased, the increase in the 0-10cm soil layer was the largest, and the 37.16%-131.98% was increased in comparison with the control; the bulk density was reduced, the 0-1Ocm soil layer was the largest, and the 0.6%-8.4% was lower than the control, and 0-40cm was improved. Soil water conservation, in particular, significantly increased the water content of 20-40cm soil, increased 21.2%-39.19% compared with the control, and increased the soil water storage in 0-40cm soil layer, increased 25.28%-48.39% compared with the control, and the whole growth period was more 10.22mm. (2) than the control. The soil microbial biomass carbon, nitrogen, phosphorus content and enzyme activity were increased in the 0-40cm soil layer, and the content reached the maximum in the bell mouth stage, the content of 10-20cm reached the maximum in the soil layer and the greatest influence on the layer. The microbial biomass carbon, nitrogen and phosphorus increased 0.62%-32.54%, 5.97%-43.61%, 8.28%-56.23%, soil urease and sucrose. Enzyme and catalase increased 2.6%-12.37%, 2.82%-14.62%, 28.22%-46.65%. (3) sandy soil modifier, which improved soil chemical properties, increased soil fertility, and increased with the increase of fertilization years. The nutrient content in the control soil increased with the depth of soil layer, and reached the maximum in the 20-40cm soil layer. The treatment with the modifier reached the maximum in the 10-20cm soil layer. In the 0-40cm soil layer, soil organic matter, total nitrogen, total phosphorus, total potassium and available nitrogen, available phosphorus, and quick available potassium, respectively, increased 0.41%-14.11%, 0.57%-13.74%, 1.23%-36.27%, 2.23%-38.61%, 0.14%-42.2%, 0.75% -19.72%, 1.62%-20.51%, and all the treatment of alkaline solution by using the modifier during the whole growth period. The reserves of available phosphorus and potassium were increased by 4.26-13.34 kg/hm2,0.52-0.87 kg/hm2,6.37-17.05 kg/hm2. (4) and the effect of increasing production and harvest was increased by the application of sandy soil modifier, while the water output rate and water use efficiency were increased. Compared with the control, 3.46%-6.91% and 7.10%-11.41% were improved; the corn grain yield of 2013 and 2014 was increased by 15.10%-59.62% and 22.75%-41.42% compared with the control. The application of sandy soil reformer could recover the cost at fourth years, the net income reached 3603.49 yuan /hm2 in fourth years, and the net income reached 8827.16 yuan in fifth years. / hm2. It can be seen that the application of sandy soil amendment has obvious improvement effect and long-term effect on sandy land, which is an effective way to increase the soil income in sandy land.
【學(xué)位授予單位】:內(nèi)蒙古農(nóng)業(yè)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:S156.2
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