It is urgent to speed up the restoration of degraded soil with 40% cultivated land quality.

Due to long-term reuse and light cultivation and extensive farming methods, the quality of cultivated land in China has been seriously degraded, accounting for more than 40% of the total area of cultivated land. Wan Lianbu, deputy to the National people's Congress and director of the National slow and controlled release Fertilizer Engineering and Technology Research Center, suggested speeding up the soil improvement and restoration project to ensure the sustainable development of agriculture.

Wan Lianbu said that in recent years, the quality of cultivated land in China has become increasingly prominent. The organic matter is decreasing in the northeast black soil area, the soil acidification is aggravated in the south and east, the shallower trend of the plough layer in North and Northeast China is obvious, the problem of secondary salinization in the northwest and along the Yellow River irrigation area is more prominent, and the problem of land pollution exists.

According to statistics, the soil productivity contribution rate of China's three major grain crops is 52 percent, which is about 20 percentage points lower than that of Europe and the United States, so it is necessary to increase agricultural inputs to ensure food security. China has used chemical fertilizers accounting for 1 / 3 of the world, and produced 1 / 5 of the world's grain. Developing agricultural production on low-quality arable land is facing multiple challenges of environment and benefit. " Representative Wan Lianbu said.

The government work report released on the 5th proposed to adhere to the red line of cultivated land, comprehensively carry out the demarcation of permanent basic farmland, implement actions to protect and improve the quality of cultivated land, promote land renovation, and increase the number of subsoiled land by 200 million mu.

Deputy Wan Lianbu suggested that we should speed up the implementation of major projects and improve the comprehensive production capacity of cultivated land. It is suggested that a special fund for cultivated land quality construction should be set up to promote the protection and improvement of cultivated land quality from different aspects, such as soil improvement, soil fertility improvement, water and fertilizer conservation, pollution control and restoration. We will promote technologies such as the integration of water and fertilizer, deep application of chemical fertilizers, and returning straw to the field, and promote the application of new fertilizers or soil remediation products such as slow and controlled release fertilizers, water-soluble fertilizers, bio-organic fertilizers and soil conditioners. We will speed up the completion of cultivated land fertility investigation and quality evaluation, improve the monitoring and early warning system of cultivated land quality, and establish a national big data platform for cultivated land quality.

At the same time, we should improve the target assessment system of governments at all levels, establish and improve the management system for the quality protection of cultivated land in the agricultural sector, and ensure that measures for the construction of cultivated land quality are implemented. Improve relevant systems and laws and regulations. In view of the phenomenon of advantages and disadvantages of cultivated land, improve the compensation mechanism of cultivated land construction; in the face of the new situation of land transfer, put the quantitative index of cultivated land quality into the land management right certificate, and establish a reward and punishment mechanism for cultivated land quality maintenance in land transfer. We will improve the investment mechanism and common responsibility mechanism for cultivated land quality protection, and earnestly strengthen the protection of cultivated land.