Double cropping rice cultivation method capable of effectively reducing cadmium

Abstract

The invention provides a double cropping rice farming method capable of effectively reducing cadmium, which comprises the following steps: 1) field treatment: 15-20 days before seedling transplanting, spreading a specific amount of lime, a cadmium reducing agent and 45% ternary compound fertilizer per mu in a field, and turning over together with astragalus sinicus planted in the field in advance, the cadmium reducing agent is obtained by physically mixing rice straw and lime in proportion and carbonizing the mixture under specific conditions. 2) cultivating early rice: sowing the early rice in March, transplanting the early rice to a field in April, harvesting the early rice in July, applying a base fertilizer in April, then dressing a tillering fertilizer and performing chemical weeding, and dressing a panicle fertilizer in May; and (3) cultivating late rice, sowing the late rice in June, transplanting the late rice to a field in July, harvesting the late rice in October, crushing and returning straws harvested by a machine in early rice to the field, topdressing urea by combining chemical weeding in July, and topdressing 45% ternary compound fertilizer in August. The brand-new cadmium-reducing double cropping rice cultivation method has the advantages of being efficient, durable, easy to operate, low in cost and easy to popularize.

Description

technical field [0001] The invention relates to the technical field of agricultural production, in particular to a double-cropping rice tillage method for effectively reducing cadmium. Background technique [0002] Cadmium (Cd) is a highly toxic and harmful heavy metal, but its natural content in soil is usually low and does not cause toxicity to animals and plants. However, if the soil is acidified, it will increase the bioavailability of cadmium, thereby promoting the uptake of the heavy metal cadmium by plants and causing toxicity to crops. Cadmium poisoning usually has no obvious symptoms visible to the naked eye, resulting in the enrichment of cadmium in the contaminated crops through the food chain, which endangers human health. [0003] In view of the severe acidification of some soils in the country (such as the red soil hilly areas of Jiangxi Province), the soil pH<5.5 accounted for more than 80%, there was moderate to mild cadmium pollution and the soil fertili...

AI Technical Summary

Problems solved by technology

[0005] Based on this, the purpose of the present invention is to provide a kind of effective cadmium-reducing double cropping rice cultivation method, to solve at least one technical problem in the prior art