Whole process regulating and controlling special control-release fertilizer for helianthus and preparation method thereof

Abstract

The invention relates to a special controlled-release fertilizer for sunflowers and a preparation method thereof. The special controlled-release fertilizer for sunflowers is produced with sulphur coated urea, improved epoxy resin coated compound fertilizer of different coating volumes, diammonium phosphate, potassium sulphate, etc. The special controlled-release fertilizer for sunflowers is applied in one go before the seedling of sunflowers, and can increase the fertilization effect. Nutrient is released gradually with the absorption of sunflowers so as to lower manure loss and increase manure utilization. The special controlled-release fertilizer for sunflowers can meet the demand for nitrogen, phosphor, and potassium by sunflowers in the annual growth period, thereby increasing the production effectively.

Description

technical field [0001] The invention relates to a sunflower-specific controlled-release fertilizer and a preparation method thereof, which belong to the technical field of slow / controlled-release fertilizers. Background technique [0002] Sunflower is one of the main oil crops in my country, and its planting area is second only to rapeseed, ranking second. Among sunflower seeds, the oil content of oil species is 40% to 56%, which is the oil crop with the highest oil content, and the oil is of good quality, not only edible, but also a good raw material for tanning, printing, coating and other fields. In the past, sunflower was only sporadically planted as edible melon seeds and ornamental flowers in northern my country. With the successful trial planting of oil-use varieties, sunflower began to be widely promoted. [0003] my country's sunflowers are mainly distributed in Inner Mongolia, Xinjiang, Heilongjiang and other places. There are the following problems in fertilizat...

AI Technical Summary

Problems solved by technology

Nitrate nitrogen is not absorbed by the soil, and is easily washed deep into the soil layer by rainfall or irrigation water, making it impossible for sunflowers to absorb it, which not only wastes fertilizer, but also pollutes groundwater

In addition, most of the soil in northern my country is calcareous soil. These soils have high calcium carbonate content and are severely affected by the fixation of phosphate fertilizers.

At present, water-soluble phosphorus fertilizers are mainly used in sunflower production. After being applied to the soil, they are directly in contact with soil particles, which is prone to immobilization, and the longer they are in contact with the soil, the more serious they are fixed, and the worse the effect on sunflowers.

Third, at present, sunflowers mainly use quick-acting fertilizers. These fertilizers cannot be applied too much at one time. Therefore, in addition to applying basal fertilizers, topdressing is also required. However, due to the insufficient depth of topdressing, the fertilizer is far away from the root system, resulting in reduced fertilizer utilization.

So far, there have been no public reports of sunflower-specific controlled-release fertilizers that can well solve the above problems