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施肥对我国竹笋生产与竹林土壤环境的影响

Effect of fertilization on bamboo shoots production and soil environment of bamboo forests

  • 摘要: 我国是竹笋生产大国,也是竹林施肥量最大的国家。施肥在增加竹笋产量的同时,也对竹林土壤环境产生了重要影响。本文通过整合分析近10年文献资料,阐释了施肥对竹笋产量、品质以及竹林土壤环境的影响,探讨了面向绿色可持续发展的竹林养分管理措施。研究表明,合理及优化施肥能显著促进竹笋生长,与不施肥处理相比,平均胸径增长率可达5.5%~33.3%,竹笋产量增产幅度为56.0%~497%。施肥能够增加竹笋的硒含量、总氨基酸态氮含量、总糖含量等,促进竹笋品质的提升。竹林不合理施肥导致土壤碳氮储量下降,加剧土壤酸化和降低土壤微生物多样性与活性,引起氮磷面源污染、重金属污染和温室气体排放增多等生态环境问题。为此,提出了通过加强竹林土壤质量监测力度与土壤培肥、优化竹林养分管理和增强农户科学施肥意识等竹林优化施肥与土壤环境改良的具体建议。

     

    Abstract: China is a large producer of bamboo shoots and the country with the largest amount of fertilizers applied to bamboo forests. Fertilization not only increases the yield of bamboo shoots, but also has an important impact on the soil environment of bamboo forests. This paper interpreted the effects of fertilization on the yield and quality of bamboo shoots and soil environment, and discussed the nutrient management measures of bamboo forests for green and sustainable development by integrating and analyzing the literature in the last ten years. The results showed that rational and optimized fertilization significantly promoted the growth of bamboo shoots, and the average increase rate of the diameter at breast height was 5.5%~33.3%, while the increase rate of the yield of bamboo shoots was 56.0%~497%. Fertilization increased the selenium content, total amino acid nitrogen content and total sugar content of bamboo shoots, and thus improved the quality of bamboo shoot. Unreasonable fertilization of bamboo forests decreased soil carbon and nitrogen storage, enhanced soil acidification, reduced biodiversity and activities of soil microbes, and caused non-point pollution of nitrogen and phosphorus, heavy metal pollution, greenhouse gas emissions and other ecological and environmental problems. Specific suggestions for optimizing fertilization and improving soil environment of bamboo forests were put forward, e.g., strengthening soil quality monitoring and soil fertility improvement, optimizing nutrient management of bamboo forests, and enhancing farmers' awareness of scientific fertilization.

     

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