養(yǎng)豬場(chǎng)高濃度沼液農(nóng)業(yè)資源化利用效果初步研究
[Abstract]:Anaerobic fermentation is an important way to use livestock manure as the main raw material in order to reduce the discharge of livestock waste and effectively link up agriculture and animal husbandry. The effects of high concentration biogas fertilizer on capsicum, Momordica charantia and soil properties were studied by using high concentration animal manure biogas liquid as carrier and inorganic fertilizer according to different crop nutrient demand. (1) original pig manure was selected to ferment as high concentration animal and poultry manure biogas liquid. Compared with the conventional pig farm biogas liquid, the nutrient content per unit volume can be increased effectively. High concentration animal manure biogas fluid was slightly alkaline, total nitrogen 15.93 g / L, total phosphorus 0.98 g / L, total potassium 6.95 g / L, active components humic acid, organic matter, middle and microelement magnesium, calcium, sulfur, boron, manganese, copper, zinc, molybdenum, iron 0.48, heavy metal chromium, cadmium, lead, (2) the formula fertilizer of high concentration animal manure biogas liquid can promote crop growth and prolong harvest period. When the total nitrogen, phosphorus and potassium application rate (1 mu, 667 m2) is used in one growth cycle, the growth characteristics of pepper are the best, the plant height and the maximum leaf area are the best. The fruit length was increased by 37.51% and 7.25% and 16.01%, respectively, when the amount of 16.89kg/ was applied, the growth characteristics of Momordica charantia were the best, the length, diameter and meat thickness of Momordica charantia increased by 21.06% 7.79% and 14.47% respectively compared with the blank. (3) compared with the blank, the balsam pear was irrigated with high concentration biogas liquid. Chlorophyll content in pepper leaves increased 16.18-39.55, net photosynthesis rate increased 13.72% -28.44, stomatal conductance increased 8.64-26.18, intercellular CO2 concentration increased 4.74-16.51, transpiration rate 17.80-24.68%, water use efficiency unchanged. Chlorophyll content in Momordica charantia leaves increased 10.98-32.55, net photosynthesis rate increased 15.20-20.16, stomatal conductance increased 6.98-11.63, intercellular CO2 concentration increased 2.56- 11.27, transpiration rate increased 9.26-22.61and water use efficiency increased 8.07-9.02.The result shows that high concentration biogas fertilizer can improve photosynthetic ability of crops. (4) pouring high concentration biogas liquid fertilizer can increase crop yield and other economic traits. Compared with conventional inorganic fertilizer, the yield of pepper per plant increased 7.21%, fruit weight per plant increased 8.70%, the yield of Momordica charantia was the highest, the yield of plot increased 3.86 -23.35%, and the yield of pepper increased by 3.86 -23.35 when the amount of 12.15kg/ was applied per mu, and the fruit weight per plant increased by 8.70%. The single fruit weight of Momordica charantia was not significantly increased, and the high concentration biogas fertilizer could replace inorganic fertilizer and bring more economic benefits. (5) compared with the conventional inorganic fertilizer, The reducing sugar decreased, the crude protein increased 8.63, the vitamin C and nitrate did not change, the vitamin C of Momordica charantia increased 9.32-18.57, the reducing sugar did not change, and the crude protein decreased. The application of high concentration biogas liquid formula fertilizer can increase crude protein of pepper, vitamin C content of Momordica charantia, decrease nitrate content of crops, and have no effect on other quality indexes. (6) pouring high concentration manure formula fertilizer with high concentration of livestock and poultry manure. The photosynthetic characters of crop growth traits, fruit quality, crop yield and soil properties were promoted. Compared with before planting, the pH of capsicum soil increased 0.07-0.13 pH units, organic matter increased 6.80-11.71, alkali-hydrolyzed nitrogen increased 0.97-24.22, total nitrogen increased 15.15-56.57 and total nitrogen increased 15.15-56.57. available potassium increased 6.06-27.67and effective phosphorus increased 24.22-45.36. Soil pH of Momordica charantia was increased by 0.05-0.28 pH unit organic matter by 3.49-14.17, alkali-hydrolyzed nitrogen by 1.68-19.12, total nitrogen by 8.64-29.63cm, available potassium by 2.36cm, available phosphorus by 2.65-6.29. It can be seen that high concentration biogas liquid fertilizer can improve soil properties and increase soil nutrient content.
【學(xué)位授予單位】:海南大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:S145.2;X713
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