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    王相震, 刘彦清, 周运红, 王利东, 司瑞雪, 陆景星, 贾忠奎. 不同处理方式对华北落叶松抚育剩余物分解的影响[J]. 北京林业大学学报, 2021, 43(5): 15-23. DOI: 10.12171/j.1000-1522.20200345
    引用本文: 王相震, 刘彦清, 周运红, 王利东, 司瑞雪, 陆景星, 贾忠奎. 不同处理方式对华北落叶松抚育剩余物分解的影响[J]. 北京林业大学学报, 2021, 43(5): 15-23. DOI: 10.12171/j.1000-1522.20200345
    Wang Xiangzhen, Liu Yanqing, Zhou Yunhong, Wang Lidong, Si Ruixue, Lu Jingxing, Jia Zhongkui. Effects of different treatments on decomposition of Larix principis-rupprechtii tending residue[J]. Journal of Beijing Forestry University, 2021, 43(5): 15-23. DOI: 10.12171/j.1000-1522.20200345
    Citation: Wang Xiangzhen, Liu Yanqing, Zhou Yunhong, Wang Lidong, Si Ruixue, Lu Jingxing, Jia Zhongkui. Effects of different treatments on decomposition of Larix principis-rupprechtii tending residue[J]. Journal of Beijing Forestry University, 2021, 43(5): 15-23. DOI: 10.12171/j.1000-1522.20200345

    不同处理方式对华北落叶松抚育剩余物分解的影响

    Effects of different treatments on decomposition of Larix principis-rupprechtii tending residue

    • 摘要:
        目的  为提高华北落叶松抚育剩余物的利用率,探索不同处理方式对抚育剩余物分解速率的影响,加快抚育剩余物分解速率,恢复华北落叶松人工林地力,使其保持长期较高的生产力。
        方法  以华北落叶松人工林抚育剩余物为研究对象,采用粉碎、尿素、EM菌和木醋液4种处理方法,进行4因素5水平的正交试验设计。通过对剩余物进行25种处理,研究不同处理方式随时间变化对华北落叶松抚育剩余物分解的影响。
        结果  分解率最高的9号处理(0.3 ~ 0.5 cm的颗粒直径,9 kg/m3的尿素溶液,稀释倍数为1 000的EM菌,稀释倍数为0的木醋液)是分解率最低的22号处理(大于1.0 cm的颗粒直径,3 kg/m3的尿素溶液,稀释倍数为0的EM菌,稀释倍数为1 000的木醋液)的2.04倍。4个因素对剩余物分解最有利的水平分别是:0.3 ~ 0.5 cm的颗粒直径,3 ~ 9 kg/m3的尿素溶液,稀释倍数为500的EM菌,稀释倍数为600 ~ 800倍的木醋液。从最优9号处理组合中可以看出,各个因素的水平不一定都在最有利的水平之内,推测其中可能存在综合效应的影响,但还需进行试验证明。
        结论  通过研究使用不同处理方式处理抚育剩余物,得出颗粒直径对剩余物分解率的影响最大,而4个因素共同作用对分解率的影响普遍大于单一的尿素溶液、EM菌和木醋液的处理。为加速人工林抚育剩余物分解,以保持林分较高的生产力提出参考建议。

       

      Abstract:
        Objective  This paper aims to improve the utilization rate of tending residues of Larix principis-rupprechtii, explore the influence of different treatment methods on the decomposition rate of tending residues, accelerate the decomposition rate of tending residues, restore the land fertility of Larix principis-rupprechtii plantations, and maintain long-term high productivity.
        Method  In this study, tending and thinning residue of Larix principis-rupprechtii plantation was used as research subject. And 4 treatment methods, including smashing residue, adding urea, EM and wood vinegar, were used to design a 4 factor and 5 level orthogonal experiment.
        Result  The results show that the decomposition rate of No.9 treatment was the highest, and levels of each factor were: particle diameter (0.3−0.5 cm), urea solution (9 kg/m3), dilution times of EM bacteria (1 000) and dilution times of wood vinegar (0 times). The decomposition rate of No. 9 was 2.04 times of the lowest decomposition rate of No. 22. The effects on decomposition of Larix principis-rupprechtii tending residue through 25 treatments were studied and the optimum level of the 4 factors which is conducive to the decomposition of residues was obtained: particle diameter (0.3−0.5 cm), urea solution (3−9 kg/m3), dilution times of EM bacteria (500) and dilution times of wood vinegar (600 to 800 times). It can be seen from the optimal processing combination of No.9 that the level of each factor is not necessarily in the best level, and we could speculate that there might be an interactive effect, but it still needs to be proved.
        Conclusion  Through the study of using different treatment methods to deal with tending residues, particle diameter was the most influential factor on the decomposition rate of the residue, and the interaction of the 4 factors is generally greater than that of unitary urea solution, EM or wood vinegar. In order to accelerate the decomposition of tending residues and maintain the high productivity of plantation, the reference methods were put forward.

       

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