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Soil microbial characteristics in sub-tropical agro-ecosystems of North Western Himalaya

机译:Himalaya北部亚热带农业生态系统土壤微生物特征

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摘要

Eight predominant land use systems, viz. agriculture (T-1), horticulture (T-2), agrisilviculture (T-3), silvopastoral (T-4), agrihorticulture (T-5), agrihortisilviculture (T-6), forest (T-7) and grassland (T-6) of subtropical parts of Himachal Pradesh were selected along two altitudinal ranges A(1) (365-635 m amsl) and A(2) (636- 914 m amsl) to observe the variation in soil microbial activity and microbial characteristics. Agroforestry land uses and forest ecosystems displayed significantly higher microbial counts and microbial biomass carbon than agriculture and grasslands. The CO2 evolution (soil microbial activity) was found higher in agrisilviculture, agrihortisilviculture, forest and grassland use systems at both altitudinal ranges. Soil biological properties (microbial count, microbial biomass and microbial activity) were maximum in forest land-use system. Among the agroforestry land-use systems, agrisilviculture had significantly higher microbial counts. The maximum microbial count (164.50 x 10(5) cfu g(-1) soil) was recorded in forest and remained statistically at par with agrisilviculture (162.34 x 10(5) cfu g(-1) soil). Minimum microbial count (80.66 x 10(5) cfu g(-1) soil) was observed in agriculture land use. At both the altitudinal ranges, the CO2 evolution was highest at 48 h time interval and decreased thereafter. The metabolic quotient (qCO(2)) indicated that C-use efficiency is higher in grassland use and agriculture land use systems than other studied systems.
机译:八个主要土地使用系统,viz。农业(T-1),园艺(T-2),Agrisilvucture(T-3),Silvopactoral(T-4),Agrievorturecure(T-5),Agrioulorti ilvullucture(T-6),森林(T-7)和草原Himachal Pradesh的亚热带部分的(T-6)沿两性范围A(1)(365-635MAMSL)和A(2)(636-914MAMSL)选择,观察土壤微生物活性和微生物的变异特征。农业遗产土地用途和森林生态系统显示出明显更高的微生物计数和微生物生物量碳而不是农业和草原。两性范围内的Agrisilvullucture,Agrioulolicults,森林和草原使用系统中发现了CO2进化(土壤微生物活性)较高。森林土地利用系统中的土壤生物学性质(微生物计数,微生物生物量和微生物活性)最大。在农林制剂土地使用系统中,农业植物的微生物计数显着更高。在森林中记录最大微生物计数(164.50×10(5)CFU G(-1)土壤),并与Agrisilvullucture(162.34×10(5)CFU G(-1)土壤)保持统计学。在农业土地使用中观察到最小微生物计数(80.66×10(5)CFU G(-1)土壤)。在均匀范围内,CO2进化在48小时的时间间隔中最高,此后减少。代谢商(QCO(2))表明,草地使用效率高于其他研究的农业效率高于其他研究。

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