Slow release fertilizer special for sweet potatoes by using biomass granular carbon as matrix and preparation method for slow release fertilizer

Abstract

The invention discloses a slow release fertilizer special for sweet potatoes by using biomass granular carbon as a matrix and a preparation method for the slow release fertilizer. Granular carbon prepared from agricultural wastes such as corn cobs, peanut shells, rice hulls and edible fungi matrix are used as a matrix material; and based on the micro-pores and strong adsorption capability of the matrix material, the granular biomass carbon-based slow release fertilizer special for the sweet potatoes is prepared by compounding the matrix material and nitrogen, phosphorus, potassium and other nutritional elements required by growth and development of the sweet potatoes.. The biomass granular carbon is black biomass granular carbon granules formed after the agricultural waste biomass is incompletely burnt under the low-oxygen condition, has multiple properties similar to soil humus and strong adsorption and nutrient and moisture holding capabilities, can stimulate growth of crops, and has good slow release performance on nitrogen, phosphorus and potassium; when the prepared slow release fertilizer is applied at one time, the requirements of the sweet potatoes for nutrients in the whole growth period can be effectively met; and the slow release fertilizer has the characteristics of increasing soil fertility, improving the structure of soil and realizing high efficiency and environment friendliness, and is beneficial to large-scale popularization and application in the production of the sweet potatoes.

Description

[0001] technical field

[0002] The invention belongs to the technical field of agricultural fertilizer production, and in particular relates to a special slow-release fertilizer for sweet potatoes with biomass granular carbon as a matrix and a preparation method thereof. Background technique

[0003] Sweet potato is a crop with strong fertility and needs more fertilizer. It must be supplied with enough nutrients to give full play to its high-yield characteristics. The absorption of nitrogen by sweet potato is fast in the early and middle stages of growth, and the demand is large. The absorption of stems and leaves reaches a peak during the growth period of stems and leaves. In the later stage, stems and leaves decline, and potato pieces expand rapidly. The speed of nitrogen absorption slows down and the demand decreases; The absorption of phosphorus gradually increased with the growth of stems and leaves, and reached the peak at the period of tuber expansion; the absorption...

Examples

Embodiment 1

[0078] Embodiment 1: The preparation technology of the special slow-release fertilizer of sweet potato with biomass granular charcoal as matrix

[0079] Follow the steps below to mix by weight ratio or weight percentage:

[0080] (1) Take large-grain urea with a nitrogen (N) content of 46%, and 80-mesh biomass granular carbon particles, mix them in a ratio of 71.2% and 28.8%, and use a disc granulator with a heating function (fertilizer Commonly used machinery in the preparation process) for coating to make an elemental slow-release nitrogen fertilizer with a nitrogen (N) content of 32.75%.

[0081] (2) Take monoammonium phosphate powder containing 11% nitrogen (N) and 46% available phosphorus (P2O5), 80-mesh biomass granular carbon particles and binder, according to 70.5%, 22.6% Mix with 6.9% ratio, carry out pressure granulation with KP-300 type organic fertilizer granulator, make nitrogen (N) amount 7.76%, contain available phosphorus (P2O5) amount and be 32.43% nitr...

[0001] technical field

[0002] The invention belongs to the technical field of agricultural fertilizer production, and in particular relates to a special slow-release fertilizer for sweet potatoes with biomass granular carbon as a matrix and a preparation method thereof. Background technique

[0003] Sweet potato is a crop with strong fertility and needs more fertilizer. It must be supplied with enough nutrients to give full play to its high-yield characteristics. The absorption of nitrogen by sweet potato is fast in the early and middle stages of growth, and the demand is large. The absorption of stems and leaves reaches a peak during the growth period of stems and leaves. In the later stage, stems and leaves decline, and potato pieces expand rapidly. The speed of nitrogen absorption slows down and the demand decreases; The absorption of phosphorus gradually increased with the growth of stems and leaves, and reached the peak at the period of tuber expansion; the absorption...

Examples

Embodiment 1

[0078] Embodiment 1: The preparation technology of the special slow-release fertilizer of sweet potato with biomass granular charcoal as matrix

[0079] Follow the steps below to mix by weight ratio or weight percentage:

[0080] (1) Take large-grain urea with a nitrogen (N) content of 46%, and 80-mesh biomass granular carbon particles, mix them in a ratio of 71.2% and 28.8%, and use a disc granulator with a heating function (fertilizer Commonly used machinery in the preparation process) for coating to make an elemental slow-release nitrogen fertilizer with a nitrogen (N) content of 32.75%.

[0081] (2) Take monoammonium phosphate powder containing 11% nitrogen (N) and 46% available phosphorus (P2O5), 80-mesh biomass granular carbon particles and binder, according to 70.5%, 22.6% Mix with 6.9% ratio, carry out pressure granulation with KP-300 type organic fertilizer granulator, make nitrogen (N) amount 7.76%, contain available phosphorus (P2O5) amount and be 32.43% nitr...