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An acid soil, dry land technology
Inactive Publication Date: 2016-11-16
HUATIAN ENG & TECH CORP MCC +1
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[0004] High and increased agricultural yields are inseparable from the application of inorganic chemical fertilizers, but crops have limited absorption and utilization of chemical fertilizers; excessive use of chemical fertilizers in pursuit of high yields often leads to problems such as fertilizer loss, soil compaction, and water pollution
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Embodiment 1
[0037] Such as figure 1 Shown, the method for present embodiment improvement dry land acidic soil comprises the steps:
[0038] Step 1: Using agricultural and forestry residues to prepare biochar and fine-grained mushroom dregs.
[0039] Wherein, the utilization of agricultural and forestry residues to prepare biochar is realized by the following methods:
[0040] Collect agricultural and forestry residues from different sources, cut the agricultural and forestry residues into 0.5-3cm segments, wash them with water and hydrochloric acid, and dry them at a constant temperature of 80°C;
[0041] Put the above-mentioned agricultural and forestry residues into the filling box of the carbonization furnace, seal anaerobic and pass nitrogen gas for 30 minutes to achieve anaerobic, and heat to 300°C-700°C at a heating rate of 5°C-10°C / min Under certain conditions, keep a constant temperature and pyrolyze for 5 to 6 hours;
[0042] Cool the carbonized product to room temperature, gr...
Embodiment 2
[0051] The method for improving acidic soil in dry land in this embodiment is to add the biochar obtained in step 1 to the acidic soil after further processing on the basis of embodiment 1.
[0052] The biochar obtained in step 1 also includes the step of carrying out activation treatment:
[0053] Mix the obtained biochar with an activator, raise the temperature to the activation temperature in an inert atmosphere for activation treatment, then cool it to room temperature, wash the product with dilute hydrochloric acid, wash it with water until it is neutral, and then dry it to obtain the biochar used in soil. Biochar;
[0054] Wherein, the activator is at least one of potassium carbonate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium acetate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, and ammonium acetate.
Embodiment 3
[0056] The method for improving acidic soil in dry land in this embodiment is to further process the biochar obtained in step 1 on the basis of embodiment 1 or embodiment 2 and then add it to the acidic soil.
[0057] The biochar obtained in step 1 also includes the step of adsorbing sodium metasilicate on the surface of the obtained biochar before being added to the soil:
[0058] Add the obtained biochar into water and mix well, then add powdered sodium metasilicate and stir again, dry the mixed mixture until the water content is 20%, and finally obtain the biochar used in the soil.
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Abstract
The invention discloses a method for improving acid soil in a dry land, and mainly aims to overcome the problems that the fertility of conventional acid soil is degraded and the acid soil is relatively high in acidity. The method for improving the acid soil in the dry land comprise the following implementation modes: preparing biomass charcoal and mushroom residues of fine particle sizes from agriculture and forestry wastes; uniformly mixing and stirring the prepared biomass charcoal and mushroom residues with urea, a calcium magnesium phosphate fertilizer and potassium chloride so as to obtain a charcoal-based mixture; sufficiently mixing the charcoal-based mixture with the acid soil in the dry land so as to obtain a soil mixture; performing biochemical culture on the soil mixture. According to the method for improving the acid soil, the charcoal-based mixture for improving the properties of the acid soil is prepared from the biomass charcoal and mushroom residues prepared from the agriculture and forestry wastes, and conventional inorganic fertilizers; the charcoal-based mixture is simple in preparation process, simple to use, low in production cost and remarkable in effect.
Description
technical field [0001] The invention relates to a method for improving acidic soil in dry land. Background technique [0002] According to the data of the "China Cultivated Land Geochemical Survey Report" released by the Ministry of Land and Resources in 2015, the organic matter content of cultivated land in most parts of my country has declined, and soil acidification and alkalization have intensified. Especially in the south of my country, with the application of a large amount of pesticides and nitrogenous fertilizers, the area and degree of soil acidification are gradually becoming severe. Therefore, finding and applying suitable amendments to neutralize soil acidity, improve soil fertility, and restore acidic soil productivity have dual meanings for the sustainable development of agriculture and the protection of the ecological environment. [0003] my country is a traditional agricultural country. According to statistics, China's agriculture can produce more than 800 ...
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