生物质炭林业应用效果及应注意的问题

Effects and Noticeable Problems of Application of Biochar to Forest Production

指出了生物质炭是一种新型土壤改良剂,可改善育苗基质、苗圃土壤及林地土壤物理化学性质及微生物活性,减轻重茬病及提高土壤肥力。提出了育苗基质中生物质炭用量一般控制在30%以下;提出了育苗田土壤及林地土壤施用量取决于经济成本、生物质炭质量及土壤肥力;生物质炭与化肥复合后施用量取决于肥料养分施用量;对于木材及薪柴林树可用生物质炭品种广,而对于收获可食用产品的经济林树避免施用含重金属含量高及其含其他污染物的生物质炭。

Biochar is newly amendment that could improve physical and chemical properties and microbe activity, relieve replant diseases and improve soil fertility of growing media, seedling nursery soil and forestry soil. The application rate of biochar to growing media generally is below 30 percentage of the substrate mass. The application rate of biochar to nursery soil and forestry soil is depended on economic cost, biochar quality and soil fertility. The application rate of biochar is depended on nutrient content of fertilizer after the combination of biochar and chemical fertilizer. The broad-spectrum biochar can be used to timber and fuel forest.However, economic forest of harvest edible productswith higher heavy metal-contained or other higher pollutants-contained biochar should be avoided.