Leaf surface blocking and controlling agent for reducing cadmium accumulation in rice and improving yield and use method thereof

Abstract

The invention relates to the field of agriculture, and discloses a leaf surface blocking and controlling agent for reducing cadmium accumulation in rice and improving yield and a use method thereof, the leaf surface blocking and controlling agent comprises 26.0 to 8.0 g of CO (NH2), 14.0 to 16.0 g of P2O5, 24.0 to 30.0 g of K2O, 2.0 to 2.5 g of humic acid, 200.0 to 300 g of NaSiO3.9H2O, 1 to 1.2 g of Na2SeO3, 1.0 to 1.5 g of Zn, 0.5 to 1 g of Fe, 1.5 to 2 g of Mg, 6.0 to 8.0 g of S and 0.5 to 1 g of Ca. The leaf surface blocking and controlling agent can reduce the content of cadmium in rice, and meanwhile can improve the rice yield. According to the method, the leaf surface blocking and controlling agent is sprayed in a gradient concentration manner, so that the situation that the yield is reduced due to the fact that the leaf surface blocking and controlling agent with over-high concentration is applied in the early stage, and rice plants are damaged can be avoided; and the concentration of the blocking and controlling agent is increased in the later stage to improve the control effect and promote rice maturation.

Description

technical field [0001] The invention relates to the field of agriculture, in particular to a foliar resistance-controlling agent for reducing cadmium accumulation in rice and increasing yield and its application method. Background technique [0002] Rice can absorb cadmium from the soil, accumulate in the grain, and then enter the food chain. Due to the difference in tolerance of cadmium between humans and plants, cadmium levels that have not shown phytotoxicity may have endangered human health. [0003] The accumulation of cadmium in rice mainly includes the following four steps: (i) uptake by the root system; (ii) transport to the shoot through the xylem vessel; (iii) distribution and transport in the rice stem nodule; (iv) sieving from the phloem of the leaf Tubes are transported into the kernels. The accumulation of cadmium in rice can be reduced by blocking one or more pathways of cadmium uptake and migration, which are the key steps of cadmium accumulation in rice. ...

AI Technical Summary

Problems solved by technology

However, although long-term flooding can effectively reduce the accumulation of cadmium in rice, it will also lead to the production of toxic and harmful substances in the soil, which will lead to a decrease in yield.

The above measures have good effects in reducing the available cadmium content in soil and realizing the safe use of contaminated rice fields. However, the long-term input of exogenous materials will not only increase the cost of agricultural production, but also cause changes in soil physical and chemical properties, microbial community structure and activity, and at the same time There is a risk of causing secondary pollution; water management is easily restricted by water source conditions

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