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新乡贤参与乡村治理的历史继承与时代超越 被引量:2
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作者 吕云涛 马梦娇 《江西农业学报》 CAS 2020年第6期146-150,共5页
论述了新乡贤参与乡村治理在维系传统乡土社会稳定、角色定位与政策限度等方面发挥的重要作用,提出了发挥新乡贤辅助党和政府治理乡村的生力军作用、引导新乡贤致力于全力全面营造乡村振兴氛围等乡村治理的实现路径。
关键词 乡村治理 新乡贤 乡村振兴战略 乡土性
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有机肥中重金属含量分析及在土壤——蔬菜中的累积状况评估 被引量:9
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作者 郝慧娟 陈万明 +1 位作者 吕运涛 廖中建 《湖南农业科学》 2018年第12期50-54,共5页
对湖南省54个有机肥料样品中的重金属含量进行了检测,并设计田间小区试验研究了不同施肥方式下鸡粪源有机肥中重金属在土壤及蔬菜中的累积状况。结果表明:(1)抽取有机肥中Pb、Cd、Cr、As、Hg、Cu、Zn、Ni含量的平均值分别为8.18、0.77、... 对湖南省54个有机肥料样品中的重金属含量进行了检测,并设计田间小区试验研究了不同施肥方式下鸡粪源有机肥中重金属在土壤及蔬菜中的累积状况。结果表明:(1)抽取有机肥中Pb、Cd、Cr、As、Hg、Cu、Zn、Ni含量的平均值分别为8.18、0.77、17.80、2.80、0.83、70.36、198.84、81.48 mg/kg,其中Cu、Zn超标较多,其次是As、Hg、Cd、Cr。(2)不同原料生产的有机肥中,重金属含量最高的原材料是工业污泥,其次是畜禽粪便、饼粕、作物秸秆。(3)只施用化肥对土壤中重金属的累积影响较小,但易导致土壤pH值下降;化肥与鸡粪肥配合施用,土壤pH值提高而重金属累积不明显,可以作为施肥的首选方式;施用2倍鸡粪肥,土壤中8种重金属均增加,且Cd、Cu、Zn的累积比较明显,累积程度明显高于1倍鸡粪肥。(4)2 a田间小区试验表明,施用有机肥对蔬菜中重金属的累积影响不明显,但呈略微增加的趋势。 展开更多
关键词 有机肥 重金属 土壤-蔬菜 累积状况
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Analysis of Heavy Metal Content in Organic Fertilizers and Evaluation of Its Accumulation in Soil and Vegetable
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作者 HAO Hui-juan CHEN Wan-ming +1 位作者 lv yun-tao LIAO Zhong-jian 《Agricultural Science & Technology》 CAS 2019年第3期39-46,共8页
The heavy metal contents of 54 organic fertilizer samples from Hunan Province were detected;meanwhile,through field plot experiments,the accumulations of heavy metals from chicken excrement-based organic fertilizer in... The heavy metal contents of 54 organic fertilizer samples from Hunan Province were detected;meanwhile,through field plot experiments,the accumulations of heavy metals from chicken excrement-based organic fertilizer in soil and vegetables under different fertilization methods were studied.The experiment results indicated that:(1)The average contents of Pb,Cd,Cr,As,Hg,Cu,Zn and Ni in the sampled fertilizers were 8.18,0.77,17.80,2.80,0.83,70.36,198.84 and 81.48 mg/kg,respectively;Cu and Zn exceeded the most than their standards,followed by As,Hg,Cd and Cr.(2)Among the organic fertilizers produced by different raw materials,industrial sludge contained the highest content of heavy metals,followed by the livestock excrements,oil-seed-meals and crop straw.(3)Only applying chemical fertilizer had a relatively small in fluence on the accumulation of heavy metal in soil while decreasing its pH value;the mixture of chemical fertilizer and chicken manure could increase the pH value in soil while accumulating little heavy metals.It is recommended that the mixture of chemical fertilizer and chicken manure should be a prior choice so as to improve soil property and ensure the safety of agricultural products.Moreover,when applying double amount of chicken manure,the contents of 8 heavy metals in soil were increased,among which Cd,Cu,Zn had obtained obvious accumulation effects,which were higher than applying a single portion of chicken manure fertilizer.(4)After two years of the field plot experiments,the accumulation of heavy metal in vegetables was not obvious under all designed fertilization modes,though increasing slightly. 展开更多
关键词 Organic fertilizers Heavy metal Soil-vegetable ACCUMULATION
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