Liquid fertilizer for drip irrigation for saline and alkaline inland, and preparation method of liquid fertilizer

Abstract

The invention discloses a liquid fertilizer for drip irrigation for a saline and alkaline inland. The liquid fertilizer comprises the following components: 20 to 40 parts of fulvic acid extracted by microbial fermentation, 20 to 30 parts of urea, 5 to 10 parts of ammonium polyphosphate, 10 to 20 parts of potassium dihydrogen phosphate, 2 to 5 parts of an inorganic additive, 2 to 3 parts of ferrous sulfate, 2 to 3 parts of zinc sulfate, 2 to 3 parts of manganese sulfate, and 0.5 to 1 part of 15 to 20wt% plant growth regulator ethanol solution. The pH value of the fertilizer is 3.5 to 4.0. The liquid fertilizer for drip irrigation provided by the invention has the advantages of effectively reducing the pH value of crop rhizosphere soil, improving the bioavailability of soil nutrients, achieving the balanced supply of water and nutrients, and improving the water and fertilizer use efficiency.

Description

technical field

[0001] The invention relates to a liquid fertilizer, in particular to a liquid fertilizer suitable for use in inland saline-alkali areas. Background technique

[0002] Soil salinization is a worldwide problem. There are 950 million hectares of saline-alkali land in the world. my country has 99.13 million hectares of saline-alkali land and 6 million hectares of saline-alkali cultivated land. Among the widely distributed saline-alkali lands, inland saline-alkali lands have the largest area, including the northwest, northeast and the middle and upper reaches of the Yellow River, accounting for about 69% of all saline-alkali lands. Improving saline-alkali land is of great significance to ensuring food security and ecological security.

[0003] Inland saline-alkali soil has the characteristics of strong alkalinity, high content of substitutable sodium ions, and poor soil physical properties. High pH value will reduce the bioavailability of phosphorus and some tra...