Controlled release water holding raise seedling culture medium for cucumber and method of preparing the same

Abstract

The present invention discloses a seedling culture medium for cucumber and a preparation method thereof. The seedling culture medium consists of a carrier, controlled release compound fertilizer of polyester coat and a water retention agent. The controlled release compound fertilizer of polyester coat consists of the following (I) and (II). (I) is the controlled release compound fertilizer of polyester coat, the release period of which is from 40 days to 60 days. Nutrient content is 19:10:11 by the mass ratio of N:P2O5:K2O. (II) is the controlled release compound fertilizer of polyester coat, the release period of which is from 100 days to 120 days. Nutrient content is 13:15:14 by the mass ratio of N:P2O5:K2O. The mass ratio of (1) and (11) is (3.0-3.4): (7.4-8.2). The proportion of the carrier and the controlled release compound fertilizer of polyester coat is that 10.4 kg to 11.6kg of the controlled release compound fertilizer of polyester coat is added to one cubic meter. The proportion of the carrier and the water retention agent is that 1.5 kg to 2.5 kg of the water retention agent is added to one cubic meter. The cucumber seedling culture medium of the invention can reduce the nitrogenous fertilizer usage amount in the early growth stage of cucumber and the discharge of nitrogen. Improving the operating factor of nitrogen, the invention has great economical, social and ecological benefit.

Description

technical field [0001] The invention relates to a cucumber controlled-release water-retaining seedling cultivation medium and a preparation method thereof. Background technique [0002] Cucumber is one of the important vegetable crops. In order to prolong the growing season and increase the multiple cropping index in production, the seedling transplanting method is often adopted, and vegetable garden soil, peat, mushroom dregs, straw, vermiculite, perlite, etc. are used as seedling substrates to cultivate suitable-age cucumbers. Strong seedlings. [0003] The large amount of nitrogen fertilizer application is a common problem in the field management of cucumber seedlings after transplanting. Under the cultivation conditions, the average nitrogen application rate of chemical fertilizers is 1782kg / hm 2 , which is 2 to 6 times the recommended amount of cucumber in greenhouses, and the excessive application of nitrogen fertilizer is particularly prominent. The demand for nitro...

AI Technical Summary

Problems solved by technology

[0004] At the beginning of the 21st century, China Agricultural University introduced the international advanced concept of comprehensive management of nutrient resources into the vegetable cultivation system, and used KNS system, N-EXPERT system and PSNT technology to optimize the nitrogen fertilizer application technology of cucumber and other vegetable crops to reduce nitrogen. The application rate is nearly 40%, which effectively reduces the nitrogen loss in the middle and late stages of crop growth, but has no significant effect on reducing the nitrogen loss in the early stage

[0007] Chinese patent (10085342.8) (2007) patently discloses a kind of melon and vegetable seedling substrate, which is compounded in proportion by fermented cow dung, peat, vermiculite, perlite and nitrogen, phosphorus and potassium compound fertilizer, and its available nitrogen source is composed of 0.2% The added amount of nitrogen, phosphorus and potassium compound fertilizer is provided, and fermented cow dung and peat can also provide some nitrogen, but the nitrogen content is low. When seedlings are transplanted, the substrate is not enough to carry a high concentration of nitrogen to meet the needs of melon crops in the early stage of growth Nitrogen demand cannot effectively reduce the nitrogen application amount in the early stage of crop growth, reduce the nitrogen loss in the early stage of growth, and improve the nutrient use efficiency