Reservoir gentle slope regression zone land limited cultivation utilization method

[0017] The specific implementation of the present invention is further explained in conjunction with the construction of the land limited farming technology of the gentle slope water-level fluctuation zone of the Three Gorges Reservoir: Zhongxian County, Chongqing City is located in the central area of ​​the middle reaches of the Three Gorges Reservoir. The valleys are dense, terraces are well developed, and the water-leveling zone has a large land area. The land use before the formation of the reservoir is mainly cultivated land with better agricultural production conditions. In this embodiment, the soil water-fluctuating zone plot in the mainstream of the Yangtze River where the second group of Xinzheng Village, Shibao Town, Zhongxian County is located, is used as a paddy field before flooding, with thick soil layers and good agricultural production conditions. After the impoundment of the Three Gorges Reservoir, the local block gradually evolved into a slope. In this example, the crop selected for planting is corn. The local corn planting season is from March to August, and the planting time of the crops is basically the same as the outcropping season of the fluctuating zone, which can achieve the rational use of land resources in the fluctuating zone to meet the needs of agricultural production.

[0018] The technology of cultivating and planting corn on the land of the gentle slope hydro-fluctuating zone in this area includes the following steps:

[0019] a. The water level of the Three Gorges Reservoir began to recede at the beginning of March. When the water level recedes and the water level reaches a certain level of drainage, the land will be prepared. Choose planting points at a distance of 30cm×30cm to loosen the land, hoe and level the soil. , The non-planting parts remain intact. As shown in the figure, 1 is the cultivation site and 2 is the non-cultivation area;

[0020] b. Corn seedlings are grown in the greenhouse and then transplanted to the water-fluctuating zone plots, and planted according to the points determined in advance for site preparation;

[0021] c. After the corn grows tall in summer, the plant species scattered in the plot also sprout and grow. Because of the higher plant height of corn, it can receive sunlight first to complete photosynthesis, and the water-level fluctuating zone has sufficient water and fertilizer resources to meet the nutritional needs of various plants ;

[0022] d. After the corn matures in August, the corn and stalks are harvested, and only low native plants remain in the water-level fluctuating zone. The crop residues produced by agricultural use are all used and will not affect the water body of the reservoir area;

[0023] e. After the storage water level of the reservoir rises in autumn, the native vegetation will protect the surface of the fluctuating zone at the same time, and the agricultural use of the fluctuating zone will not damage the ecological environment function of the native vegetation.