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Physico‑chemical, microbial and phytotoxicity evaluation of composts from sorghum, finger millet and soybean straws

سال انتشار: 1398
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 344

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شناسه ملی سند علمی:

JR_ROWA-8-3_005

تاریخ نمایه سازی: 6 اسفند 1398

چکیده مقاله Physico‑chemical, microbial and phytotoxicity evaluation of composts from sorghum, finger millet and soybean straws

Purpose Composting is an environmentally sustainable alternative for bioconversion of agricultural residues into a nutrientrichproduct that can enhance soil fertility/microbial diversity and thereby improve agricultural productivity. The goal of thecurrent study was to evaluate the decomposition pattern of the agro-residues and assess the maturity and phytotoxicity ofthe composts obtained using physico-chemical, microbial and statistical analyses. The study also attempted to determine athreshold germination index (GI) to serve as a maturity index for the composts by conducting seed germination assays withtomato, chickpea and soybean seeds.Methods Three agricultural residues/straws of Eleusine coracana (finger millet), Sorghum bicolor (sorghum) and Glycinemax (soybean) were subjected to aerobic composting for a period of 60 days to study the impact of saw dust on the decompositionpattern and the ultimate compost quality/characteristics.Results The results showed efficient decomposition pattern of the agricultural residues characterized by high temperatureprofiles (up to 70 °C), high microbial activity, a sharp decrease in C/N ratio of the composting materials, i.e., from an initial41–61 to final 10–17.Conclusions Statistical evaluation of seed germination assays showed that only the compost obtained from sorghumstraw + saw dust was mature and free from any phytotoxicity as all the tested seeds showed higher and statistically significantGIs. It was difficult to attribute a single threshold GI value to indicate maturity of compost and could not further be appliedto different types of composts as different seeds responded differently to the same compost.

کلیدواژه های Physico‑chemical, microbial and phytotoxicity evaluation of composts from sorghum, finger millet and soybean straws:

Straw · Compost · Phytotoxicity · Maturity · Germination index (GI) · Seed germination

نویسندگان مقاله Physico‑chemical, microbial and phytotoxicity evaluation of composts from sorghum, finger millet and soybean straws

P.S Jagadabhi

International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, Telangana ۵۰۲۳۲۴, India

S.P Wani

International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, Telangana ۵۰۲۳۲۴, India

M Kaushal

Present Address: International Institute of Tropical Agriculture (IITA), Hyderabad, Telangana, Tanzania

M Patil

International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, Telangana ۵۰۲۳۲۴, India

A.K Vemula

International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, Telangana ۵۰۲۳۲۴, India

A Rathore

International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, Telangana ۵۰۲۳۲۴, India