摘要
为探究生物质炭及其用量对肥料养分的缓释效果,利用实验室圆盘造粒机制备了生物质炭用量为10%、20%、30%的炭基复混肥,采用土柱模拟淋溶法研究了炭基复混肥在土壤中氮、钾淋出率。结果表明:添加生物质炭能够减少肥料氮、钾淋出量,且随着生物质炭用量的增加炭基复混肥氮、钾素累积淋出率逐渐减小。当第10次淋溶时,生物质炭用量为10%、20%、30%炭基复混肥的氮素累积淋出率分别较不添加处理减少了6.03%、12.49%、33.72%,钾素累积淋出率较不添加处理分别减少了5.15%、5.29%、13.58%,且添加30%生物质炭处理显著大于其他处理。用一级动力学方程、Elovich方程和抛物线方程对各处理养分释放曲线拟合,结果显示一级动力学方程拟合效果最好,可用于表征氮、钾素累积淋出率与时间的关系。
In order to explore the slow-release effect of a biochar fertilizer, biochar compound fertilizers granulated with 10%, 20%, 30% biochar were prepared, and the nitrogen and potassium leaching property was studied using soil column method. The results showed that adding biomass carbon could reduce the amount of nitrogen and potassium leaching, and the rate of nitrogen and potassium accumulation decreased with the increase of biomass carbon content. The nitrogen leaching rate of the biochar compound fertilizer with 10%, 20%, 30% biochar was 6.03%, 12.49%, 33.72% less than that of the control, and the potassium accumulation leaching rate was 5.15%, 5.29% and 13.58% less than that of the control. The treatment with 30% of biochar was the best. With the first-order kinetic equation, Elovich equation and parabolic equation on the nutrient release curve fitting, the results showed the best fitting kinetic equation could be used to characterize the effect of nitrogen and potassium accumulation leaching rate and the relationship between the time.
作者
杨凯
王家宝
王莉
林清火
华元刚
罗微
茶正早
YANG Kai;WANG Jiabao;WANG Li;LIN Qinghuo;HUA Yuangang;LUO Wei;CHA Zhengzao(Institute of Tropical Agriculture and Forestry, Hainan University, Danzhou, Hainan 571737, China;Rubber Research Institute, CATAS, Danzhou, Hainan 571737, China)
出处
《热带作物学报》
CSCD
北大核心
2018年第4期641-645,共5页
Chinese Journal of Tropical Crops
基金
现代农业产业技术体系建设专项资金项目(No.CARS-33)
中国热带农业科学院橡胶研究所基本科研业务费专项资金(No.1630022017005
No.1630022017007)
关键词
生物质炭
炭基复混肥
氮钾淋出率
缓释效果
slow release fertilizer rods
nitrogen and potassium leaching rate
slow-release effect
