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Special drought-resistant controlled-release fertilizer for potatoes, and preparation and application thereof
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A potato and controlled-release fertilizer technology, applied in the field of controlled-release fertilizers, can solve the problems of incomplete nutrient release, no water retention function, low fertilizer utilization rate, etc. Effect
Active Publication Date: 2011-09-14
菏泽金正大生态工程有限公司
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However, this patent document only considers the nutrient absorption status of potatoes, and does not involve the impact of soil nutrient status in different regions on fertilizer use efficiency, nor does it have water retention functions. This fertilizer may not release nutrients completely during the potato growing season in arid areas. , low fertilizer use efficiency
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Embodiment 1
[0051] Drought-resistant potato-specific controlled-release fertilizer, the ingredients are as follows:
[0059] (1) Take 380 kg of weathered coal, 600 kg of corncobpowder, and 20 kg of carboxymethyl cellulose, mix them evenly, and granulate them with discs with a particle size of 2-4 mm to obtain a water-retaining composition.
[0060] (2) Preparation of 5% humic acid coated urea and 7% humic acid coated urea:
[0082] The preparation method is the same as in Example 1.
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Abstract
The invention relates to a special drought-resistant controlled-release fertilizer for potatoes, and a preparation and application thereof. The controlled-release fertilizer comprises the following raw materials: 270-350 parts of moisture-retaining composition, 60-120 parts of 5% humic acidcoated urea, 120-160 parts of 7% humic acidcoated urea, 280-350 parts of urea primer coat 4% modified epoxy resin coated potassiumnitrate, 120-160 parts of diammonium phosphate and 8-12 parts of zincsulfate, wherein the moisture-retaining composition is prepared by mixing and granulating weathered coal, corn cob meal and carboxymethyl cellulose, and the rest of the raw materials can be purchased on the market. The raw materials are proportionally and evenly stirred and mixed to obtain the controlled-release fertilizer. The special controlled-release fertilizer provided by the invention is used for planting potatoes in arid and semiarid regions in northwest China; and the nutrient proportion of the special controlled-release fertilizer satisfies the demand of high yield for the potatoes in the northwest China, enhances the efficiency of the controlled-release fertilizer and relieves the influence of insufficient soil moisture on the growth of potatoes.
Description
technical field [0001] The invention relates to a controlled-release fertilizer, in particular to a drought-resistant potato-specific controlled-release fertilizer suitable for the arid and semi-arid regions of Northwest my country, as well as its preparation and application. Background technique [0002] my country's Gansu, Ningxia, northwestern Shaanxi, and eastern Qinghai have cool climates, abundant sunshine, and large temperature differences between day and night, which are especially suitable for potato production. According to statistics, in 2010, the potato planting area in this region was stable at 17 million mu, with an average yield of 1040 kg per mu and a total output of 17.68 million tons. Potatoes are of good quality and have great potential for increasing yield per unit area. [0003] Potato products are underground tubers, which have special requirements for the supply of nutrients, especially nitrogen. For example, the amount of nitrogen fertilizer should ...
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