30results about How to "Reduce risk of leaching" patented technology

The invention relates to a scallion, ginger and wheat rotation production method capable of improving the land production capacity. According to the method, ginger is planted in early April of the first year, wheat seeds are sowed in ginger channels in the middle of October or in late October, and ginger is harvested in late October; wheat is harvested in early June of the second year; then, in late June, land preparation is conducted for scallion planting and scallion is harvested in early December. According to the method, the three different crops of the ginger, the wheat and the scallion are planted in a rotation mode, the problem of soil successive cropping obstacle can be solved due to the influences of root exudate, and the soil continuous production capacity can be improved.

The invention belongs to the technical field of soil protection, and in particular relates to a repair method for farmland soil heavy metal pollution. In this method, the heavy metal passivation agent is mixed evenly with the soil. After the maintenance, the first crop is planted, and then the hyperaccumulator plant is planted. At the same time, the heavy metal activator is applied, and then the passivation agent is applied. After the second crop is planted, the heavy metal passivation is applied first. The leaching agent can effectively reduce the risk of heavy metal leaching, and at the same time avoid the accumulation of heavy metals in crops, and then apply heavy metal activators to plant hyper-accumulator plants, absorb heavy metals, reduce the content of heavy metals in the soil, and prevent the accumulation of heavy metals in the soil in the area not covered by plant roots. Heavy metals keep the risk of leaching low due to the presence of heavy metal deactivators. The invention adopts the plant enrichment technology and the method of applying the heavy metal passivation agent, which can fundamentally remove the problem of heavy metals, and can passivate the heavy metals when planting crops, thereby improving the use efficiency of the soil.

The invention discloses a method for promoting the reduction of soil nitrate by an iron film at the root of rice. The iron film of the rice can strengthen the reduction of nitrate, and is coupled with the process of iron oxidation and reduction, thereby increasing N 2 The invention can enrich soil denitrifying microorganisms and iron redox microorganisms, and can enhance the nitrate reduction of crop microorganisms, and couple the redox of iron, thereby reducing the risk of nitrate leaching, and is a kind of original It is an environment-friendly method under bit conditions, and has strong practical operability.

The invention discloses a fertilizing method for winter wheat. The fertilizing method comprises the following steps: collecting soil data, meteorological data and management measure data of a target area; inputting the collected data into an applicability process model for simulation, and using measured output for calibration and verification of the model; determining the maximum potential targetyield of winter wheat in the target area by using the calibrated model; then determining the target yield of recommended fertilization in the target area; calculating the agronomic nitrogen efficiencyof the winter wheat crops in the target area according to the target yield; estimating the nitrogen fertilizer usage amount in the target area according to the agronomic nitrogen efficiency; determining the usage amounts and types of organic fertilizers and chemical fertilizers for the target area according to the nitrogen fertilizer usage amount in the target area; and simulating the nutrient absorption curve of the winter wheat according to the applicability process model, and determining the distribution proportion of a base nitrogen fertilizer and a topdressing nitrogen fertilizer and thevarieties of the nitrogen fertilizers according to fertilizer distribution results. The fertilizing method of the invention improves soil quality which producing agronomic effect, output benefits andenvironmental benefits.