Method for promoting rapid growth of tamarix chinensis in severe saline-alkali soil

Abstract

The invention discloses a method for promoting the rapid growth of tamarix chinensis in severe saline-alkali soil and increasing a planting benefit. The method comprises the following steps: seedbed construction; cutting treatment; cuttage planting, namely directly inserting a cutting end dipped with rooting powder into soil, and exposing the top end of a cutting out of the ground by 2-3cm; soil covering and heat insulation; fertilizer application, namely starting to germinate tamarix chinensis subjected to cuttage from the end of March to the beginning of April in the next year, and at the moment, properly applying a fertilizer to be beneficial to the rapid growth of tamarix chinensis; and carrying out management and stumping. Compared with an existing technology, the method disclosed bythe invention has the advantages that the increments of stem diameter, plant height and crown breadth of the tamarix chinensis are remarkably increased, the reduction of the later-period growth speedafter the vigorous growth period of the tamarix chinensis is obviously delayed, the salt content of the section of the soil is also remarkably reduced, and the contents of Na<+> and Ca<2+> in leaves of the tamarix chinensis are remarkably increased. The usage amount of the fertilizer is greatly reduced, the utilization ratio of the fertilizer is increased, the loss of the fertilizer is reduced, and the win-win goals of rapid and green development as well as efficient improvement of the saline-alkali soil are achieved.

Description

technical field [0001] The invention relates to a forestry planting technology, in particular to a method for accelerating the rapid growth of suitable forests in heavy saline-alkali land and improving saline-alkali land. Background technique [0002] There are about 954 million hm in the world 2 Saline-alkali land, accounting for 10% of the land area, 7% of the cultivated land area, about 10-20 million hm per year 2 It is difficult for vegetation to grow on saline-alkali land. In the arid and semi-arid coastal areas in northern my country, the area of ​​heavy saline-alkali land and controllable tidal flats is about 700,000 hm 2 , is an important reserve soil resource. Most plants in these areas cannot grow, and only a few extremely salt-tolerant wild plants such as reeds and Suaeda salsa can grow sporadically. Therefore, using local water and soil resources, using fertilizer and diluting salt to improve soil fertility; washing salt with salt water, alleviating the high-...

AI Technical Summary

Problems solved by technology

However, this method has the problems of wide fertilization and nitrogen fertilizer application.

Tamarix is ​​a shrub or small tree with a large spacing between plants and a relatively thin density. According to the area and manual application, it is easy to cause volatilization and loss of urea after decomposition.

The single application of nitrogen fertilizer can not meet the comprehensive demand of tamarisk for nutrients in the nutrient-poor saline-alkali land, and the fertilization effect cannot be achieved

Secondly, spring is the peak season of salt return in saline-alkali land. Cutting Tamarix in spring needs to be irrigated in the mid-winter season before cutting, and the salt water is frozen to desalinize the soil through melting ice water. Field irrigation in this period is very hard work.

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