Special fertilizer for carbon-based and selenium-rich tea and preparation method thereof

Abstract

The invention discloses a special fertilizer for carbon-based and selenium-rich tea. The fertilizer is composed of the following raw materials by weight parts: 22-25 parts of biological black carbon, 35-40 parts of urea, 14-16 parts of ammonium dihydrogen phosphate, 16-20 parts of potassium chloride, 4-6 parts of a binder, 1-2 parts of bone meal, 0.2-0.4 parts of ammonium sulfate, and 0.1-0.2 parts of attapulgite. According to the invention, increasing of soil carbon sequestration and organic carbon are obvious, wherein carbon-based carbon sequestration effects are obvious; due to chemical and microbiological inertia of the biological black carbon and physical protection of soil aggregates, the biological black carbon becomes inert carbon pool of the soil, only 5 % of the carbon are re-released into the atmosphere through effects of soil microbe, and 95 % of the carbon are fixed by the soil, thereby generating net carbon absorption; and a fixed time of the biological black carbon in the soil can be hundreds years. A content of soil organic matters can be increased in a short period through turning over of green manure for tea garden soil and application of organic manure, however, a decomposition period is only a few months, and an improvement for the content of the soil organic matters is far lower than the improvement by the biological black carbon. The tea special fertilizer applied with the biological black carbon as an adsorbent can substantially improve the content of soil organic matters and nutrient accumulation.

Description

technical field [0001] The invention mainly relates to a special fertilizer, in particular to a special carbon-based selenium-enriched tea fertilizer and a preparation method thereof. Background technique [0002] Tea is one of the main economic crops planted in southern my country. The tea in Chizhou, Anhui is famous all over the world. Qi Hong has won the gold medal in the Panama International Exposition. The existing tea garden covers an area of ​​250,000 mu. Fertilization is the material basis for the sustainable development of tea production and an important technology to increase tea production and improve tea quality. According to relevant research, the average annual increase in tea production in major tea-producing countries in the world is 3.11%, of which the contribution rate from fertilizers reaches 41%, exceeding the contribution rates of land (25%) and labor (8%). Fertilization can optimize the composition of tea quality and ensure the sufficient supply of...

AI Technical Summary

Problems solved by technology

Natural selenium-enriched tea comes from natural high-selenium areas in my country, such as Enshi, Hubei and Ziyang, Shaanxi. Most of the selenium-enriched teas currently on the market are obtained by spraying selenate or selenite on the leaves, but their The content of organic selenium in the autolyzate is not high, the biological activity is low, the human body is not easy to absorb, and the toxic and side effects are large

The advantage of spraying selenium fertilizer on leaves is that the amount of selenium increases rapidly, but the residual amount of inorganic selenium is large and the distribution is uneven. Rich in selenium, no increase in selenium in the pulp, there is a joke of "eating grapes without spitting out grape skins"

The mineral selenium fertilizer applied by ordinary soil application process is not easy to be deeply activated due to its large particle size, and the selenium element inside the large particle cannot be released well and absorbed by plants. Therefore, the application rate per mu is as high as hundreds of kilograms. Due to backward technology, it failed enter the market

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