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两种楤木根际土壤碳特征及酶活性
1,2, 3, 4

(1zunyishifanxueyuanshengwuyunongyekejixueyuan, guizhou zunyi 563000; 2zunyishifanxueyuanshandishengtaiyanjiusuo, guizhou zunyi 563000; 3guizhoushifandaxue shengmingkexuexueyuan, guiyang 550000; 4jiangxinongyedaxue nongxueyuan, nanchang330045)

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Characteristics of Carbon and Enzyme Activity of Rhizosphere Soil of Two Aralia Arborescens
ZHANG Baocheng1,2, YANG Chunxiu3, WANG Jing4

(1.school of biology & agricultural science and technology, zunyi normal college, zunyi 563000, china; 2.institute of mountain ecology, zunyi normal college, zunyi, guizhou 563000, china; 3.college of life sciences, guizhou normal university, guiyang 550000, china; 4.agricultural college of jiangxi agricultural university, nanchang 330045, china)

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备注

为了研究经济作物对土壤根际土壤有机碳的影响,以喀斯特2种不同类型的楤木为对象研究了楤木对根际土壤碳、微生物碳和酶活性。结果表明:(1)楤木类型影响到根际土壤有机碳含量,与对照组相比小叶型楤木根际土壤有机碳含量最高,其次是大叶型楤木;(2)楤木类型影响到根际土壤脲酶、蔗糖酶和过氧化物酶活性。小叶型楤木根际土壤脲酶、蔗糖酶和过氧化物酶活性高于大叶型楤木根际土壤酶活性;(3)小叶型楤木根际土壤微生物呼吸最大,其次是大叶型楤木,对照组最低;(4)土壤微生物呼吸与土壤脲酶和细菌数量显著相关,相关系数分别为0.65,0.61; 土壤微生物呼吸随着土壤无机碳含量的增加呈负相关关系,相关系数为-0.67; 土壤有机碳含量与微生物呼吸呈现边缘显著(p=0.06)。由上可知,不同类型楤木影响到土壤根际碳含量。因此,今后在品种选育中可以把根际土壤碳增收作为参考指标,为低碳农业的发展提供科学依据。
In order to study the effects of cash crops on soil organic carbon in rhizosphere, two different types of alder were used to study their effects on soil carbon of rhizosphere. The results show that:(1)different types of Aralia affect the content of soil organic carbon in the rhizosphere; soil organic carbon in rhizosphere of Small-leaf type of alder was the highest, followed by big lea, it is the lowest the control group;(2)the type of alder affects the activities of urease, sucrase and peroxidase in the rhizosphere, activities of enzymes in the rhizosphere of the small leaf type of alder are higher than those in the large leaf type of alder;(3)the highest microbial respiration was found in soils of small-leaf alder, followed by large leaf alder, the microbial respiration of the control was the lowest;(4)soil microbial respiration is significantly related to soil urease and bacterial counts, and the correlation coefficients are 0.65 and 0.61, respectively; soil inorganic carbon content showed negative relation to soil microbial respiration, the correlation coefficient is -0.67; soil organic carbon content and microbial respiration presented marginal significance(p=0.06). These results indicate that the increase of soil carbon income in rhizosphere can be taken as a reference index in the future breeding, which can provide the scientific basis for the development of low-carbon agriculture.
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