Zinc-rich watermelon fertilizer and preparation method thereof

Abstract

The invention discloses zinc-rich watermelon fertilizer. The zinc-rich watermelon fertilizer is prepared from raw materials in parts by weight as follows: 200-210 parts of rice straw, 20-21 parts of kaolin, 4-5 parts of peanut hulls, 1-2 parts of brown sugar, 10-11 parts of urea, 2-3 parts of eggshell powder, 0.1-0.2 parts of lactic acid bacteria, 1-1.1 parts of potassium oxide, 1.2-1.3 parts of calcium magnesium phosphate fertilizer, 1.1-1.2 parts of zinc sulfate, 15-16 parts of polyvinyl alcohol, 1-1.1 parts of tea polyphenol, 1-1.1 parts of carbon nanotubes, 1.2-1.3 parts of beta-cyclodextrin and 800-810 parts of ammonia water with the concentration of 28%. Amino groups are introduced into biochar prepared from the rice straw and can be chelated with heavy metal, the heavy metal adsorption capacity of the fertilizer is improved, and the contamination effect of the heavy metal on soil and the environment is relieved; further, the carbon nanotubes are added to an enveloping liquid, the mechanical strength of a film can be improved, and the slow release effect of the film can be improved by means of the added tea polyphenol; besides, the fertilizer is rich in zinc and can increase the zinc content of cultivated watermelons.

Description

technical field [0001] The invention relates to the technical field of fertilizer processing, in particular to a zinc-rich watermelon fertilizer and a preparation method thereof. Background technique [0002] my country is a large agricultural country, and the quantity of rice stalks is huge. According to the annual survey and statistics, the total amount of rice stalks is about 100 million tons, and it is increasing at a rate of 100 million tons every year. In the process of using crop rice straw, the cost of machinery and equipment required in the process of collecting, transporting and utilizing rice straw is too high, the industrial chain is short, lack of technical support and misunderstandings of people's cognition and other problems make the utilization rate of crop rice straw not high In many areas, crops and rice stalks have been discarded and burned, resulting in waste of resources and environmental pollution. Biochar is made by carbonizing biomass materials such ...

AI Technical Summary

Problems solved by technology

However, at present, most of the biochar is mixed with basic fertilizers and applied to the soil, which limits the transportation, storage, and application of biochar.