Different Soil Conditioner On Selenium Rich Soil Improvement Effect And Economic Evaluation

In order to protect the basic farmland, keep the dynamic balance of cultivated land quantity, improve the land output rate, increase agricultural income effectively, and protect environment. The provinces are in accordance with "the ministry of land and resources on working out the land consolidation planning notice" (made [2010] 162) requirements. Land reclamation work is put the disturbed land regulated into arable land, or basic farmland. On the quantity, it satisfied the requirements of the country, but the quality is far from the land and basic farmland quality requirements. Selenium rich soil is more and more valued by people, the repeated use of the soil, adding chemical fertilizer, reducing land productivity, greatly hindering the benign cycle of ecological environment and production of agriculture and animal husbandry, that problem need to be solved now. The effective and economically viable selenium-rich soil improvement methods become an important means to improved selenium-rich soil structure and increase effective selenium. At present, the domestic and overseas research about selenium rich soil are focused on the physiologic properties of selenium rich soil and the aspects of selenium rich soil. But the studies of selenium-rich soil quality are less, so this thesis has important significance to the research of selenium-rich soil quality improvement.In this thesis, as the lime (GS), bamboo charcoal (GT), peat (GN) amendment to the perspective of selenium-rich red soil improvement effect starting. Study the growth status of two kinds of forage plant alfalfa and astral sinuous in selenium rich red soil, analysis and observe nutrient quality index, after the analysis of various indicators to the plant, than know in which conditioners processing, the soil quality has significantly improved, and economic utility is best.Comparative the measurement indicators of analysis and gray correlation analysis and economic utility evaluations, reached the following conclusions on the measured index experiment:(1) The results of plant adaptability analysis grown in improved selenium-rich soil showed that, in the GN2 treatment, physiological and biochemical indexes of alfalfa is best, we can know that planting alfalfa in selenium rich soil, the best improvement effects of GN2 on soil; in the GS1 treatment, physiological and biochemical indexes of the astral sinuous is beat, planting astral sinuous in selenium rich soil, the best improvement effects of GS1 on soil.(2) using the gray correlation degree analysis on alfalfa, correlation value of the order is GT1 (0.82)>GT2 (0.819)>GS1 (0.749)>GN1 (0.726)>GN2 (0.707)>GS2 (0.695)> GCK (0.648), under GT1 treatment, the correlation value is maximum, that of planted alfalfa in these the soil, the best improvement effects of GT1 on soil; To astral sinuous, correlation value of the order is GS1 (0.650)>GT1 (0.616)>GT2 (0.611) >GN1 (0.603)>GN2 (0.557)>GS2 (0.538)>GCK (0.426), under GS1 treatment, the correlation value is maximum. That of planted astral sinuous in these soils, the best improvement effects of GS1 on soil.(3) With economic effectiveness evaluation, under GS1 treatment, we can know that the input and output of alfalfa and astral sinuous is 1:5.12 and 1:6.72, the input-output ratio of the minimum, that is the economic utility is best, soil improvement effect is best.The comprehensive analysis shows that, after dealing with the GN1 of selenium-rich soil most suitable for planting alfalfa, after dealing with the GS1 of selenium-rich soil most suitable for planting astral sinuous.