Studies on physio morphological attributes of crops and weeds as influenced by organic weed management practices in maize - pea cropping system
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Date
2023-01-20
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CSK HPKV, Palampur
Abstract
Studies were carried out in a long-term experiment in maize - peas cropping system
under All India Coordinated Research Project on Weed Management (AICRP-WM)
during October 2019 to September 2021 at Palampur. Ten weed control treatments
based on T1-hoeing, T2-stale seed bed + hoeing, T3-raised stale seedbed + hoeing, T4-
mulch 5t ha-1
, T5-stale seed bed + mulch, T6- raised stale seed bed + mulch, T7-
intercropping of soybean in kharif and fenugreek in rabi, T8-crop rotation (alternating
soybean - mustard with maize - peas), T9-intensive cropping (additional crops of
mustard in autumn and buckwheat in summer) and T10-chemical check
(pendimethalin in rabi and atrazine in kharif) were evaluated in a randomized block
design with three replications. The weed flora were comprising of 14 species in rabi
2019-20 and 11 in rabi 2020-21, 8 weed species during kharif 2020 and 15 in kharif
2021. There was considerable change in weed species composition during the second
year as compared to the first year. Diversity and phytosociological analysis revealed
diverse weed flora in the organic weed management treatments as compared to the
chemical check. Phenological study revealed extended periods of
germination/emergence, flowering and fruiting. Rabi weeds emerged during October
to January and kharif during May to August, flowered and bore fruits/seeds during
March (rabi) and September (kharif) and reached maturity in April (rabi) and
September (kharif), respectively. Yield, net income and net energy were significantly
higher under RSSB + Hoeing/HW followed by crop rotation, however, chemical
check was at par to this treatment in the second year. Crop rotation also gave higher
profitability over the check. The growth analysis parameter viz, CGR, AGR and RGR
found to be significantly more in intercropping and crop rotation.