摘要
【目的】研究施用不同配比的牦牛Bos grunniens粪生物质炭和牦牛粪堆肥以及聚丙烯酰胺(PAM)对沙化土壤养分淋溶的影响。【方法】在实验室条件下,设置8个处理:单施堆肥处理,炭肥混施(1∶1)处理,以及单施生物质炭处理。另设定不添加炭肥的空白处理。同时,在上述同样处理的基础上再对应地添加PAM,构成添加PAM区组,开展为期60 d的土柱模拟淋溶实验并测定土壤养分。【结果】总体而言,施用生物质炭或者堆肥都可以增强土壤养分含量,但炭肥混施的效果要明显优于单施生物质炭或单施堆肥。与空白对照相比,占土壤质量3%的生物质炭及堆肥混施能够显著增加土壤pH值,使土壤呈弱碱性,有机质质量分数提高530%,土壤全氮质量分数提升255%、硝态氮质量分数提升24.1%,总磷质量分数提升120%,有效磷质量分数提升78%,但对铵态氮效果不显著。此外,添加PAM可以有效降低外源养分的淋溶损失;根据炭肥混施处理的结果,全氮淋溶率减少9.6%,总磷减少7.1%。【结论】混施生物质炭及堆肥产品并配合PAM可以有效提高土壤养分质量分数,同时减少养分渗流的发生。
[Objective] This study aimed to determine the effects of different proportions of biochar and compost from Bos grunniens waste as well as the polyacrylamide(PAM) on nutrient leaching in desertified soil.[Method] Experiment were conducted in the laboratory by using soil column leaching method. All of treatments were divided into two groups, with and without PAM. Additionally, each group include four treatments, Bos grunniens biochar only, Bos grunniens biochar: Bos grunniens compost equal to 1∶1, bos grunniens compost only and the control treatment. [Result](1) In general, the application of biochar or compost can enhance soil nutrients, and the effect of combined application of biochar fertilizer is significantly better than that of single application of biochar or compost.(2) Compared with the control group, the mixed application of biochar and compost(1∶1, w/w) with a rate of 3% of soil weight can significantly increase the soil pH and make the soil become weak alkalescent: the organic matter content increased by 530% with the addition of biochar and compost, the total nitrogen concentration increased by 255%, with the nitrate nitrogen concentration improved by 24.1% and the total and available phosphorus contents increased by 120% and 78%respectively, with no significant impact on the ammonium nitrogen content, though.(3) The addition of PAM can effectively reduce the leaching loss of exogenous nutrients with the total nitrogen leaching rate decreased by9.6% in the presence of biochar and compost and the total phosphorus decreased by 7.1%. [Conclusion] The application of biochar and compost products with the addition of PAM can effectively increase the soil nutrient content while reducing nutrient seepage.
作者
欧盛业
丁黎
余宁尔
吴胜春
梁鹏
OU Shengye;DING Li;YU Ninger;WU Shengchun;LIANG Peng(College of Environment and Resources,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China;Zhejiang Key Laboratory of Soil Bioremediation,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China)
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2020年第6期1088-1096,共9页
Journal of Zhejiang A&F University
基金
国家科技支撑计划资助项目(2015BAC05B05-03)。
关键词
牦牛粪炭
牦牛粪堆肥
沙化土壤
养分淋溶
Bos grunniens manure biochar
compost product
desertification soil
nutrient leaching
