Method for improving inland saline-alkali land by intercropping oat with Jerusalem artichoke

Abstract

The invention discloses a method for improving inland saline alkali soil by virtue of interplanting jerusalem artichoke and oat. The method comprises the following steps of: (1) performing land leveling in autumn, applying organic fertilizers, desulfuration gypsum and a chemical modifier and performing winter irrigation; (2) applying chemical fertilizers in spring, and performing rotary tillage and rake leveling; (3) interplanting and seeding at an interval of three rows of jerusalem artichoke and 10 rows of oat, wherein seed tuber seeding is adopted for the jerusalem artichoke; the jerusalem artichoke plant quantity per mu is controlled at 3000 plants, and the oat seeding quantity is 10kg / mu; (4) cultivating and weeding as well as hilling during a period that the main stem of jerusalem artichoke has 7 to 8 leaves, and spraying a herbicide before sealing ridges of the oat so as to control field weeds; and (5) starting harvesting oat seeds at the stage of milky ripeness, and starting harvesting underground stem tuber of the jerusalem artichoke when leaves of the jerusalem artichoke start turning yellow in the middle ten days of October, wherein the straws of oat are utilized as silage, and the straws of jerusalem artichoke are utilized as feedstuff. According to the method, the complementation of advantage effects of the jerusalem artichoke and the oat is utilized, so that mutualism and joint yield increase are realized; the jerusalem artichoke and the oat adsorb saline matters in the soil simultaneously and fertilize the soil, so that the saline-alkali harms are reduced.

Description

technical field

[0001] The invention relates to a method for biologically improving saline-alkali land, in particular to a method for improving inland saline-alkali land by intercropping Jerusalem artichoke and oats in a certain ratio. Background technique

[0002] my country has a total of 99.13 million hectares of saline-alkali land, of which the inland saline-alkali land area is the largest, accounting for about 69% of the national saline-alkali land. Inland saline-alkali land has the characteristics of strong soil alkalinity, high content of substitutable sodium ions, poor soil physical properties, poor crop emergence and low yield. At present, the improvement methods of inland saline-alkali land mainly include hydraulic engineering measures, chemical measures, agronomic measures and biological measures. Water conservancy measures are the basis for improvement of saline-alkali land, but the investment is relatively large, and water conservancy measures alone cannot repl...

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