Effect of conservation tillage and weed management practices on microbial biomass carbon of soil and root growth of soybean in soybean (Glycine max) – wheat (Triticum aestivum) cropping system

سال انتشار: 1394
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 399

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شناسه ملی سند علمی:

AFPICONF03_146

تاریخ نمایه سازی: 12 تیر 1395

چکیده مقاله:

A field experiment was conducted during rainy season 2010-11 and 2011-12 at the research farm of Division of Agronomy, Indian Agricultural Research Institute, New Delhi. The treatments included four tillage and crop establishment practices, viz. conventional tillage (CT)-flat-bed, CT-raised-bed, zero tillage (ZT)-flat-bed and ZT-raised-bed; and four weed management options, viz. control, pendimethalin @ 0.75 kg ha-1 as pre-emergence (PE) + hand weeding (HW), pendimethalin @ 0.75 kg ha-1 as PE + imazethapyr @ 75 g ha-1 as post-emergence (POE), wheat straw mulch @ 5 t ha-1 + imazethapyr @ 75 g ha-1 as POE. The microbial biomass carbon (MBC) in ZT both flat and bed (216.3 and 214.6 μg/g of soil) was recorded significantly higher than the CT (flat and bed) the same was also with weed management treatments where the wheat straw mulch + imazethapyr recorded 19.62 % higher than the control. Root parameters of soybean was significantly influenced by the tillage treatments but revers trend was observed in case of weed management treatment. Among the tillage treatments CT both flat and bed performed well with root length density (RLD) (1.38 cm/cm3); root surface area (RSA) (0.67 cm2/cm3); root volume density (RVD) (19.22 x 10-3 cm3/cm3) and average root diameter (1.66 mm) were recorded by soybean and wheat crop. Number of nodules was consciously higher under CT-raised-bed than all other tillage and crop establishment treatments, all of which, showed almost equal nodule count. Thus, short-term zero tillage and crop establishment along with weed management practices improved the soil biological properties and root growth.

نویسندگان

Nafiseh Rang Zan1

Assistant Professor, Department of Soil Science, Ramin Agricultural and Natural Resources University, Iran.

A Monsefi

Ph.D. of Agronomy, Division of Agronomy, Indian Agricultural Research Institute, New Delhi, India.

A.R. Sharma

Director, ICAR-Directorate of Weed Research, Jabalpur, India.