Controlled release fertilizer for Chinese cabbage and preparing method thereof

Abstract

The invention discloses a controlled release fertilizer for Chinese cabbage and preparting method thereof. The controlled release fertilizer for Chinese cabbage is prepared by the following raw materials by weight: 15-25 parts of potassium dihydrogen phosphate, 5-10 parts of sulfate, 15-25 parts of urea, 20-30 polylactic acid and 10-20 parts of polyvinyl alcohol. The controlled release fertilizer for Chinese cabbage combines and pellets potassium dihydrogen phosphate, sulfate and urea to prepare a compound fertilizer and controls the content of nitrogen, phosphorus and potassium in the compound fertilizer and the particle size of the compound fertilizer, which increases the permeability of the fertilizer. The degradation period of the degradable material obtained by blending the polylactic acid and the polyethylene is similar to that of the cabbage, and then the degradable material wraps the compound fertilizer according to the strict proportion, so that the prepared controlled release fertilizer can meet the nutrient need for the growth of Chinese cabbage, and ensure the long-term average release of N, P and K elements, so as to improve the quality and yield of Chinese cabbage.

Description

technical field [0001] The invention relates to the technical field of fertilizer processing, in particular to a special controlled-release fertilizer for Chinese cabbage and a preparation method thereof. Background technique [0002] Cabbage, a biennial herb, 40-60 cm high, usually glabrous throughout the plant, sometimes with a few spiny hairs on the midrib below the leaves. Native to northern China, it is a leafy vegetable of the genus Brassica in the family Brassicaceae, usually referring to Chinese cabbage; it also includes pakchoi and the cultivar head cabbage, namely "cabbage" or "cabbage". Introduced to the south, it is cultivated in all parts of the north and south. In the nineteenth century, it was introduced to Japan, Europe and the United States. There are many kinds of Chinese cabbage. The Chinese cabbage in the north includes Shandong Jiaozhou Chinese cabbage, Beijing Qingbai Chinese cabbage, Tianjin Qingmaye Chinese cabbage, Northeast Chinese cabbage, Yutian...

AI Technical Summary

Problems solved by technology

[0003] Because cabbage has extremely high edible value and nutritional value, the cultivation techniques of cabbage have appeared one after another. The control of fertilizer in the process of cabbage cultivation is especially critical. In addition to being absorbed by cabbage, the rest will be lost, resulting in a lot of waste. In order to reduce this loss, it is necessary to coordinate the release of fertilizer nutrients with the nutrient absorption of cabbage. Therefore, the development of controlled-release fertilizers is becoming more and more. For this reason, the inventor provides a special controlled-release fertilizer for Chinese cabbage and a preparation method thereof for the characteristics of Chinese cabbage growth.