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巢湖藻–草–泥堆制有机肥对土壤性质的影响
陈 婷, 韩士群, 周 庆
江苏省农业科学院农业资源与环境研究所
摘要:
通过田间试验,研究施用由巢湖取出物蓝藻、水草和底泥高温堆肥制作成的有机肥对作物产量、土壤理化性质及微生物学特性的影响。结果表明:施用藻-草-泥有机肥对大豆、花生有明显增产效应。施肥土壤中总氮、碱解氮、总磷、有效磷、有机质、腐殖酸、阳离子交换量和土壤孔隙度均显著高于未施肥土壤,而容重显著降低。与未种植未施肥处理(T1)相比,种植大豆施肥(T4)和种植花生施肥处理(T5)中微生物生物量碳分别增加116.5%、97.8%,微生物生物量氮增加196.7%、170.6%;T4处理的转化酶、脲酶和过氧化氢酶活性分别提高183%、392% 和8.9%,T5处理中相应酶活性分别提高116%、268%、1.01%。相关性分析表明,微生物生物量碳、氮和转化酶、脲酶活性都与多种肥力因子呈显著相关,且转化酶及脲酶活性间存在显著相关性。T4处理中过氧化氢酶活性与肥力因子间无显著相关性,而T5处理过氧化氢酶活性与有效磷、有机质、腐殖酸、微生物生物量碳、微生物生物量氮间呈显著相关。巢湖取出物蓝藻、水草和底泥可作为生产有机肥的良好材料以达到资源化利用目的。
关键词:  藻–草–泥有机肥  土壤理化性质  微生物生物量碳氮  酶活性  产量
DOI:10.13758/j.cnki.tr.2018.05.008
分类号:X705
基金项目:国家水专项巢湖项目(2012ZX07103-005)资助。
Effects of Organic Fertilizer Made from Algae-Grass-Mud in Chaohu Lake on Soil Properties
CHEN Ting, HAN Shiqun, ZHOU Qing
Institute of Agricultural Resource and Environmental Sciences,Jiangsu Academy of Agricultural Sciences
Abstract:
Organic fertilizer was made from cyanobacteria, macroohytes and sediment salvaged from Chaohu Lake by the high temperature composting and its effects on crop yield, soil physiochemical properties and microbial characteristics were studied through a field experiment. The results showed that this algae-grass-mud organic fertilizer could significantly increased soybean and peanut yields, the values of total nitrogen (TN), alkali solution nitrogen, total phosphorus (TP), Olsen phosphorus, organic matter, humic acid, soil porosity and CEC, significantly reduced soil bulk density. Compared with the treatment of non plant and non fertilization (T1), soil MBC and MBN of fertilization-planting soybean (T4) and fertilization–planting peanut (T5) increased by 116.5%, 97.8%, and 196.7%, 170.6%, respectively; the activities of invertase, urease and catalase in T4 and T5 treatments increased by 183%, 392%, 8.9% and 116%, 268%, 1.01%, respectively. In addition, significant correlation was found among soil MBC, MBN and soil TN, TP, organic matter, humic acid, invertase and urease activities. No significant correlation existed between catalase activity and soil fertility factors in T4 treatmenut, However, significant correlation was found among urease activity, Olsen phosphorus, organic matter, humic acid, soil MBC and MBN in T5 treatment. It is feasible to recycling use cyanobacteria, macroohytes and sediment salvaged in Chaohu Lake in producing organic fertilizer.
Key words:  Algae-grass-mud organic fertilizer  Soil physiochemical properties  Microbial biomass carbon and nitrogen  Enzyme activity  Yield

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