Cultivation method for selenium-rich hybrid rice

Abstract

The invention discloses a cultivation method for selenium-rich hybrid rice. The cultivation method comprises the following steps: firstly, enabling selected rice seeds to early germinate until seeds emerge the tips, placing the germinated seeds in a growing tray, placing selenium-rich nutrient soil in the growing tray, uniformly sowing rice grain sprouts and then covering a layer of selenium-rich nutrient soil, wherein the thickness of the selenium-rich nutrient soil is needed to meet the requirement that no bud bourses are exposed; secondly, after placing seedling trays, orderly stacking the seedling trays, arranging every 20 trays into a stack, arranging every 10 stacks into a line, and reserving a clearance between every two lines by 20cm to facilitate the flowing of air; covering rainproof cloth for preserving the heat; after 2 days, placing the grain sprouts on a pre-leveled seedling bed after the grain sprouts in a vertical needle shape come up by 1cm, and determining whether to cover with non-woven fabric according to air temperature at that time; after transplanting for 3-5 days, spraying selenium-enriched foliage fertilizer once until soil on the seedling bed is in a wet state, and after the seedlings grow for 15-17 days, transplanting the seedlings to a field; thirdly, performing transplanting fertilization management according to a conventional method until the selenium-rich nutrient soil is subjected to top dressing in early July, and dressing 10 kilos of selenium-rich nutrient soil in each mu; from July 15 to July 20, spraying the selenium-enriched foliage fertilizer once and waiting for harvesting.

Description

technical field [0001] The invention relates to the field of agricultural technology, in particular to a method for cultivating selenium-enriched hybrid rice. Background technique [0002] Rice is the main food crop in my country, and the population whose staple food is rice accounts for about 50% of the total population. my country's rice planting area reaches 29.96 million hectares, with a vast distribution area. Due to historical reasons such as food pressure, my country's rice production used to aim at high yield, and paid less attention to the content of rice microelements. With the increasing living standards of residents and the development of foreign trade, the development of microelement-enriched rice technology will continue to grow. received more attention. [0003] Selenium, the element symbol Se, is an essential trace element for the human body and is the active center of glutathione peroxidase. It has biological properties such as anti-cancer, anti-aging (ant...

AI Technical Summary

Problems solved by technology

However, due to the special paddy field planting method of rice, it is easy to cause the loss of selenium fertilizer in the process of paddy field irrigation and water release, which reduces the utilization rate of selenium fertilizer, and the lost selenium is easy to increase the burden of selenium in the soil and water environment, and long-term use is easy to cause selenium. Pollution

[0008] However, the relevant known technologies do not involve selenium-rich rice seedlings, rice rich in organic selenium, and specific production methods for cultivating rice rich in organic selenium.