Method for reducing and controlling bamboo forest nitrogen runoff loss by utilizing charcoal and buffer zone coupling

Abstract

The invention discloses a method for reducing and controlling bamboo forest nitrogen runoff loss by utilizing charcoal and buffer zone coupling and belongs to the field of agroecological environment protection. The method comprises a step (1) of applying charcoal: applying the charcoal in a runoff producing area of a bamboo forest, wherein the application quantity of the charcoal is 0.5-3 kg / m2; a step (2) of arranging a buffer zone: lining out the buffer zone at the low-gradient water discharging end of a bamboo forest runoff area, wherein the specification design of the buffer zone is that the length is consistent with the length of the runoff area and the width is 0.5-3.5 m, and planting lolium perenne, cynodon dactylon or zoysia japonica in the buffer zone. Based on a charcoal and buffer zone coupling technology, the effect of applying the method to an intensively managed bamboo forest to reduce and control the soil nitrogen runoff loss is monitored, mechanism analysis is performed, so that the bamboo forest soil nitrogen runoff loss is reduced from two links which are source decrement and process blockage more effectively, and the goal of improving utilization efficiency of nitrogen fertilizer input into the bamboo forest and protecting the water environment is achieved.

Description

technical field [0001] The invention relates to the field of agricultural ecological environment protection, in particular to a method for reducing and controlling nitrogen runoff loss in bamboo forests by coupling biochar and a buffer zone. Background technique [0002] In the planting process of intensively managed bamboo forests, 2.25t / hm is generally applied in November 2 The compound fertilizer (N:P:K=15:15:15), but with the continuous development of intensive management, high fertilizer input, loose soil, weeding and other management behaviors lead to bare and loose bamboo forest surface soil, resulting in When rainfall occurs, surface runoff increases significantly, and nitrogen nutrients are easily lost with surface runoff. Moreover, bamboo forests are mostly located at the source or both sides of rivers and lakes, and the nitrogen nutrient with soil erosion migrates directly into the water body after a short distance, leading to problems such as eutrophication of t...

AI Technical Summary

Problems solved by technology

[0005] The application of a single technology can effectively control nitrogen runoff loss, but a considerable part of nitrogen will still be lost into the surrounding water bodies with the occurrence of runoff events, threatening the water body environment and reducing the utilization efficiency of bamboo forest input fertilizers

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