Fertilizer for promoting suaeda salsa to repair coastal severe saline-alkali soil and detection method

Abstract

The invention belongs to the technical field of saline-alkali soil improvement, and discloses a fertilizer capable of promoting suaeda salsa to repair coastal severe saline-alkali soil and a detectionmethod. The fertilizer capable of promoting suaeda salsa to repair coastal severe saline-alkali soil is a nitrogen fertilizer and a potassium fertilizer. The nitrogen fertilizer is 30 kg 667 m<-2>; and the potassium fertilizer is 30 kg 667 m <-2 >. By comparing the influences of suaeda heteroptera on saline alkali soil remediation and physicochemical property improvement after different fertilizers are applied tosuaeda heteroptera, the economic value and the ecological value of suaeda heteroptera are excavated, and the low-cost coastal severe saline alkali soil remediation method is found. Insalinized soil, a nitrogen fertilizer is a limiting factor for restricting growth and salt absorption of suaeda salsa. In the range of 0-450kg hm<-2>, the biomass of each part of suaeda salsa is in alinear increasing trend along with the nitrogen topdressing amount, the nitrogen fertilizer topdressing can promote the bioremediation of suaeda salsa to the saline soil, and the total salt content and the Na<+> and K<+> contents in the surface soil of the soil are obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of saline-alkali land improvement, and in particular relates to a fertilizer and a detection method for promoting Suaeda salsa to repair coastal severe saline-alkali land. Background technique [0002] Soil salinization is a worldwide problem. According to incomplete statistics from UNESCO and FAO, the area of ​​saline-alkali land in the world is 954 million hm 2 . The total area of ​​saline-alkali soil in my country is 99 million hm 2 , widely distributed and large in number, about 80% of the saline-alkali land has not been developed and utilized. Shandong Province is one of the provinces with the largest distribution area of ​​coastal saline-alkali land. The coastal saline-alkali land is mainly concentrated in the Yellow River Delta area. Due to the relatively flat terrain and poor drainage, coupled with the lateral seepage of the Yellow River water and the infiltration of seawater, the soil salinization...

AI Technical Summary

Problems solved by technology

[0012] (3) The physical improvement method has a large amount of engineering and high cost; chemical reagent improvement will also bring a certain amount of salt, increasing the salinity of the surface soil

The coastal saline-alkali land ecosystem is fragile, seriously polluted by human influence, the soil has high salinity and poor nutritional status

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