【摘要】 【目的】进行蔗田土壤有机质平衡预测,为甘蔗生产中合理使用甘蔗残体、糖厂滤泥和酒精废液,提高土壤肥力及甘蔗产量提供依据。【方法】采用尼龙网袋将有机物料与土混合埋于新植蔗行间,埋置后1年后取样测定有机物料碳的残留量,确定土壤有机物料腐殖化系数,并根据Jenny数学模型公式Ct=A/K-(A/K-C0)e-kt,对蔗田土壤有机质平衡进行预测。【结果】蔗叶、蔗根、蔗头、滤泥、酒精废液腐殖化系数分别为0.39、0.46、0.20、0.15与0.07;要保持蔗田土壤有机质平衡在21.19g/kg,每年需向土壤施入稳定有机质2004.0kg/ha,即需要蔗根4356.5kg/ha(干重),5138.5kg/ha蔗叶(干重)、10020.0kg/ha蔗头(干重)、13360.0kg/ha滤泥(干重)、28628.6kg/ha酒精发酵液(固形物);要稳步提高土壤有机质含量,培肥土壤时间越长,每年投入的有机质量越少,反之则越多。【结论】循环利用甘蔗糖业中的蔗叶、糖厂滤泥、糖厂酒精废液等有机物料,可以促进土壤肥力的提高。更多还原

【Abstract】 [Objective]This research forecasted the soil organic matter balance in sugarcane field for the rational use of sugarcane residue, filtered mud, and vinasse in sugarcane production in order to increase soil fertility and to provide basis for improving sugarcane yield. [Method]Soil organic materials were mixed with soil and then buried into sugarcane lines using nylon bags. After 1 year, the organic materials were sampled and the carbon residue was determined in order to establish the soil organic matter humification coefficient and to forecast the soil organic matter balance in sugarcane field according to the Jenny mathematical formula model: Ct=A/K-(A/K-C0)e-kt. [Result]The result showed that the humification coefficients of sugarcane leaves, roots, underground cane stalks, filtered mud, and vinasse were 0.39, 0.46, 0.20, 0.15, and 0.07, respectively. To keep the soil organic matter content at 21.19 g/kg,2004.0 kg/ha of stable organic matter need to be applied to the soil annually, which include 4356.5 kg/ha of sugarcane roots(dry weight), 5138.5 kg/ha of sugarcane leaves(dry weight), 10020.0 kg/ha of underground cane stalks(dry weight), 13360.0 kg/ha of filtered mud(dry weight), and 28628.6 kg/ha of vinasse(solid matter dry weight). To steadily increase the soil organic matter content, the longer the application period of organic materials, the fewer amounts of organic materials were needed annually, vice versa. [Conclusion]In the cane sugar industry, recycling sugarcane leaves, filtered mud, vinasse, and other organic materials could improve soil fertility.更多还原