Planting technology of alfalfa in saline and alkaline land

Abstract

The invention discloses a planting technology of alfalfa in a saline and alkaline land. The technology mainly comprises four steps including pre-processing of the saline and alkaline land, sowing, field management, measurement and harvesting, etc. According to the invention, soil compositions and the alfalfa yield are changed greatly after improvement; the highest salt rejection rate in the soil reaches up to 50.22%; dry weight of the unit area of alfalfa increases by 0.21-0.30kg; the water content decreases slightly with the decrease rate of 0.30-2.13%; and the mu yield increases by 139.14-199.33kg. Hence, the technology disclosed by the invention has significant effects in aspects such as increase of the soil utilization rate and improvement of land quality; outstanding achievements can be obtained in plantation of the alfalfa; and during pasture plantation, wind protection and sand stabilization are achieved. Therefore, the technology disclosed by the invention can achieve outstanding economic benefits and social benefits.

Description

technical field [0001] The invention relates to the technical field of agricultural planting, in particular to a technique for planting alfalfa in saline-alkali land. Background technique [0002] Saline-alkali soil is a soil type widely distributed on the earth's land, accounting for about 25% of the total land area. The area of ​​saline-alkali land in my country alone is more than 33 million hectares. The annual increase of saline-alkali land in the Yellow River Delta in Shandong Province reaches as many as 6,000 hectares. , do not pay attention to the matching of drainage and irrigation projects, water management and regulation, so that the area of ​​land salinization is still expanding, and a large amount of land is abandoned. The main manifestations of the hazards of soil salinization are: ①Crop yield reduction, high soluble salt content, high concentration of soil solution, high osmotic pressure, resulting in abnormal growth of crops, resulting in crop yield reduction....

AI Technical Summary

Problems solved by technology

The main manifestations of the hazards of soil salinization are: ①Crop yield reduction, high soluble salt content, high soil solution concentration, high osmotic pressure, resulting in abnormal growth of crops, resulting in crop yield reduction

②Decrease in soil fertility: the deterioration of soil structure hinders the growth of plant roots, which not only affects the absorption of water and fertilizer by plants, but also reduces the supply and coordination of soil to water, fertilizer, gas and heat, and also limits the further improvement and improvement of soil fertility. potential fertility

③ Soil resources are difficult to use: saline-alkali hazards have formed a large number of medium and low-yield fields, making it difficult to use large areas of soil resources, reducing comprehensive agricultural production capacity, and destroying the ecological environment, seriously affecting the development of agricultural production and the improvement of farmers' living standards

In view of this, the utilization rate of saline-alkali land is generally low at present. For the Hexi Corridor area in Gansu Province, desertification is serious and the usable land is seriously insufficient. The problem of land shortage is of great significance, and it can play a role in windbreak and sand fixation, and improvement of saline-alkali land

Images