Fruit expanding period topdressing fertilizer for walnut trees, and preparation method thereof

Abstract

The invention belongs to the technical field of fertilizers, and provides a fruit expanding period topdressing fertilizer for walnut trees, and a preparation method thereof. The purpose of the invention is to timely meet the requirements for a large amount of nutrient substances in growth, development and other physiological activities of young fruits of walnut trees after blossom dropping and fruit setting in order to improve the photosynthesis efficiency of blades of the fruit trees in the young fruit expanding period, accumulate nutrients, promote the rapid growth and development of the young fruits and reduce fruit dropping. The fertilizer comprises 10-15 wt% of nitrogen, 3-6 wt% of phosphorus, 10-20 wt% of potassium, 0.1-1 wt% of calcium, 0.1-0.8 wt% of sulfur, 0.5-1 wt% of magnesium,0.2-0.5 wt% of boron and 8-10 wt% of humic acid. The above proportions accord with the nutrient demand law of physiological activities in the fruit expansion and flower bud differentiation periods, can promote rapid growth and development of the young fruits to reduce physiological fruit dropping, and can enhance the photosynthesis efficiency of the blades to increase nutrient accumulation, promote the growth of new shoots and ensure the high yield in the same year and the following year. The fertilizer can be applied cooperatively with a micro-irrigation system to improve the absorption rateand avoid wastes and soil residual; and the preparation method has the advantages of simplicity, low cost, and suitableness for industrial production.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and in particular relates to a topdressing fertilizer in the expansion stage of walnuts and a preparation method thereof. Background technique [0002] Fertilization of fruit trees is one of the important measures to ensure high yield, stable yield and high quality of fruit trees. Over the years, my country's high agricultural production has been mainly due to the application of large amounts of chemical fertilizers. The overweight of many soil nutrients and the lack of trace elements have led to soil salinization, compaction and deficiencies. Such as zinc deficiency, the leaves are small and yellow, curled, and in severe cases, the leaves of the whole tree are small and curled, and the tops of the branches die; manganese deficiency, the leaves lose chlorosis, and the veins become light green, withered spots on the mesophyll and leaf margins, prone to premature Falling; boron deficiency, bra...

AI Technical Summary

Problems solved by technology

If other elements are supplemented, it is not only useless, but sometimes even causes antagonism to inhibit the absorption of other elements, thus causing other deficiency diseases or obesity.