Secondary saline soil repairing agent and production method thereof

Abstract

The invention belongs to the technical field of soil repairing agents and particularly relates to a secondary saline soil repairing agent and a production method thereof. The technical scheme is as follows: the secondary saline soil repairing agent consists of the following components in parts by weight: lignite and/or weathered coal, a microorganism agent, an activating agent, dry chicken manure, inorganic nutrients and middle-trace elements. The production method of the secondary saline soil repairing agent comprises the following steps: crushing, mixing, stirring, activating, pelleting, drying, cooling and sieving the raw materials so as to obtain the black brown powdery substance or particle. By using the secondary saline soil repairing agent, the content of saline and alkaline in the soil is greatly reduced, the granular structure of the soil is enhanced, and the physical and chemical properties of the soil are fundamentally improved; and after water is added in the secondary saline soil repairing agent for dilution, the time of irrigating and improving the soil along with water is short, water is saved, the investment is less, and return is quick.

Description

technical field [0001] The invention belongs to the technical field of soil remediation agents, in particular to a secondary salinized soil remediation agent and a production method. Background technique [0002] Due to the important role of protected cultivation (mainly plastic greenhouses, solar greenhouses and mulching technology) in the off-season and cross-regional planting of vegetables and other important economic crops in my country, protected agriculture has been widely promoted and applied throughout the country. Area from 7,500 km in 1981 2 Developed to the current 2.1 million km 2 , Accounting for 70% of the world's protected cultivation area, it has become the country with the largest protected cultivation area and its total output in the world. However, what is incompatible with it is that there is no set of suitable soil and fertilizer management measures in the protected cultivation system. [0003] Because the soil under conditions such as greenhouses and ...

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Problems solved by technology

However, what is incompatible with it is that there is no set of suitable soil and fertilizer management measures in the protected cultivation system.

[0003] Because the soil under conditions such as greenhouses and greenhouses lacks rainwater washing, and the temperature, humidity, ventilation conditions, and water and fertilizer management are quite different from those of open field cultivation, and facility cultivation has long been in a state of high intensification, high multiple cropping index, and high fertilizer. Under the production status of application rate, its special ecological environment and unreasonable water and fertilizer management measures have led to many production problems such as soil secondary salinization, nutrient imbalance, and soil acidification, among which the most prominent is soil secondary salinization. Salinization, it not only directly endangers the normal growth or even death of crops, but also easily causes other related production problems

The degree of salinization of the facility soil is closely related to the facility environment and human farming management. Greenhouse and greenhouse growers often blindly apply excessive chemical fertilizers and organic fertilizers that have not been sterilized, decomposed or not thoroughly sterilized and decomposed, resulting in The reproduction of harmful bacteria causes the deterioration of the physical properties of the soil in the greenhouse

[0004] According to the survey, the amount of fertilizer input in greenhouses is 4 to 10 times that of open fields, and 6 to 8 times that of crops. The annual application of organic fertilizers in Shandong Province for facility cultivation is 75,000 to 15,000 kg / hm 2 , the annual input of chemical fertilizer is 6000~9000kg / hm 2 The average annual application of organic fertilizers in places such as Shouguang, Cangshan, and Tai'an reaches 198,750kg / hm 2 , fertilizer is 6825kg / hm 2 , seriously excessive, most of which are N fertilizers, while K fertilizers are only 960kg / hm 2 The utilization rate of N by crops is less than 10%, and the remaining 90% is accumulated in the soil or enters the groundwater or is lost in other forms. The soil in the greenhouse is salinized and hardened, and there are lumps of purple-red jelly (purple algae) on the soil surface. Generally, when the soil salt content reaches 1g / kg, its normal growth will be affected. When it reaches 2-3g / kg , it is difficult for the root system to absorb water. When it is higher than 4g / kg, the water in the plant is easy to leak out, the growth rate is significantly reduced, and even the death of the crop is caused.

[0007] In short, secondary salinized soil has become a common problem in protected cultivation in my country, and has seriously restricted the sustainable development of protected agriculture.