Method for improving saline-alkali soil

Abstract

The invention discloses a method for improving saline-alkali soil. The method includes selecting saline-alkali soil improvement fertilizer comprising coal with not less than 40% of humic acid, organic farmyard manure, rhizobium manure and fulvic acid potassium; ploughing the soil and applying the saline-alkali soil improvement fertilizer; applying base fertilizer; irrigating the soil; soaking rice seeds in warm water until the seeds are cracked, sowing the seeds after water in the field evaporates and the soil layer is exposed, and irrigating the soil after the rice seeds take root; performing topdressing, and applying the saline-alkali soil improvement fertilizer and earing nourishing fertilizer according to seedling conditions, water quality and soil quality. The method has the advantages that salt-alkali resistant rice varieties are combined with the saline-alkali soil improvement fertilizer organically, the saline-alkali soil improvement fertilizer can meet nutrition requirements for rice growth, reasonable matching is achieved, raw materials used are from extensive minerals and industrial and agricultural waste, low cost and high pertinence are realized, improvement cost is reduced, and technical popularization and promotion are benefited.

Description

technical field [0001] The invention relates to the field of land management, in particular to a method for improving saline-alkali land. Background technique [0002] Declining arable land has become a worldwide problem. It is a good choice to develop coastal tidal flats and inland saline-alkali land and make full use of existing resources. The area of ​​cultivated land in our country is limited, and all kinds of coastal tidal flats and inland saline-alkali lands (because coastal tidal flats and inland saline-alkali lands are different from ordinary cultivated lands are due to their high salt content and are difficult to cultivate, so the coastal tidal flats and inland saline-alkali lands are referred to below Saline-alkali land is collectively referred to as saline-alkali land) There are more than 99 million hectares of saline-alkali land with a salinity above 3‰ and below 8‰, because of the high salt content, it is either left unused or barely utilized, and its output is ...

AI Technical Summary

Problems solved by technology

[0008] 5. Improper farming management: Some places are flooded with water when watering, or low-lying areas are only irrigated but not drained, so that the groundwater table rises quickly and salt accumulates, turning the original good land into saline-alkali land. This process is called secondary salt Degradation

However, in the prior art, there is no scientific and effective comprehensive management method to improve saline-alkali land. Only one small aspect of treatment is used to treat the symptoms, not the root cause, and the saline-alkali land cannot be fundamentally improved.