Influence of a six-year organic and inorganic fertilization on the diversity of the soil culturable microrgansims in the Indian mid-Himalayas

Autor: Jeevanandan Krishnan, M. D. Tuti, Jaideep Kumar Bisht, Chandrashekara Channakeshavaih, B.M. Pandey, Dibakar Mahanta, Jagdish Chandra Bhatt, K.A. Gopinath, Eldho Varghese, Arunkumar Raja, Pankaj Mishra, Ranjan Bhattacharyya
Rok vydání: 2017
Předmět:
Zdroj: Applied Soil Ecology. 120:229-238
ISSN: 0929-1393
DOI: 10.1016/j.apsoil.2017.08.012
Popis: Industrial agriculture inputs can diminish soil microbial biodiversity. The use of organic soil amendments may foster beneficial microorganisms. Organic production systems have increased in recent years, but we know little about the effect of these production practices on soil culturable microbial diversity compared to inorganic fertilization. Therefore, the objective of our research was to evaluate the effect of two levels (high and low) of three organic amendments (poultry manure, vermicompost and cattle manure) versus inorganic fertilization (IF) on soil culturable microorganism diversity and selected soil properties after six years under a gardenpea ( Pisum sativum var. hortense L.)-french bean ( Phaseolus vulgaris L.) system in a sub-temperate soil of the mid-Himalayas. There was at least 31% greater population of beneficial microorganisms with application of high level (6 Mg ha −1 ) of poultry manure (PM 6 ) than IF in the surface soil layer (0–15 cm depth). The highest soil culturable microbial diversity index was recorded with PM 6 (0.562). Application of high level (6 Mg ha −1 ) of vermicompost (VC 6 ) yielded the highest Trichoderma species count, and PM 6 plots had similar values to VC 6 . The morning and afternoon surface soil temperature moderation during the coldest and hottest weeks with PM 6 amendment was 0.50 and 1.73 °C higher over IF, respectively. The soil cracking surface area under PM 6 was 112% less than IF (0.311 m 2 m −2 area). Application of PM 6 provided 38 and 29% higher gardenpea and french bean pod yields than IF, respectively. The soil organic carbon under PM 6 in the surface layer was about 9% greater than IF. Soil organic carbon markedly influenced soil culturable microbial diversity, moderation of soil temperature and other soil properties. Thus, application at 6 Mg ha −1 poultry manure for each crop is recommended over inorganic fertilizer for higher soil culturable microbial diversity under gardenpea-french bean system in this region and similar agro-ecologies.
Databáze: OpenAIRE
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