A special humic acid fertilizer for sweet potatoes and its preparation method

Abstract

The invention relates to a special humic acid fertilizer for sweet potatoes. The special humic acid fertilizer is shaped like a solid granule, wherein a core raw material comprises the following straight fertilizers in percentage by weight: 10-40% of urea, 5-20% of diammonium phosphate, 15-45% of potassium sulfate and 1-20% of an additive; a binder and a wrapped coating account for 20-40% of the total weight of the fertilizer; nitro humic acid accounts for 30-60% of the total weight of the wrapped coating, ureido humic acid accounts for 10-30% of the total weight of the wrapped coating, and a conditioner accounts for 10-20% of the total weight of the wrapped coating. The special humic acid fertilizer for sweet potatoes contains effective components such as a nitrogen fertilizer, a phosphate fertilizer, a potassium fertilizer and a composite microelement fertilizer special for the sweet potatoes and is prepared by smashing and uniformly mixing nitrogen, phosphorus, potassium and other macroelements and microelements for the growth of the sweet potatoes in a straight fertilizer or formed compound fertilizer way at a proper ratio according to the fertilizer requirement ratio and time of the sweet potatoes; and the added compound nitro humic acid and ureido humic acid have different nitrogen forms, so that the requirements of the sweet potatoes to nitrogen in the whole growth period can be met.

Description

technical field [0001] The invention relates to the field of crop fertilizer and fertilizer preparation, in particular to a slow-release sweet potato special fertilizer containing ureido humic acid and nitro humic acid and a preparation method thereof. Background technique [0002] my country is the largest country in sweet potato production. The planting area accounts for 65% of the world's total planting area, and the output accounts for more than 80% of the world's total output. The annual output is more than 1.17 billion tons. Sweet potato has the characteristics of drought resistance and barrenness. It is often planted on thin mountainous land. The soil texture of the potato is sandy, with low organic matter content, poor water and fertilizer retention, and generally no irrigation conditions. Rainfed agriculture is mainly used, so the yield and quality Restricted by the planting environment, it has been maintained at a low level. Fertilizers are mostly used as basal fe...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the many defects in the prior art, the object of the present invention is to provide a kind of humic acid sweet potato special fertilizer and its preparation method, which solves the problems of easy loss of common chemical fertilizers, low nutrient utilization rate, barren soil for planting potatoes, and poor water and fertilizer retention. The problem is to prolong the fertilizer effect time through the fusion of activated humic acid and available nutrients, improve the soil water and fertilizer retention performance, promote the growth of sweet potato roots, increase the yield of sweet potatoes, and improve the quality of potato pieces