Pollinators diversity and their effects on rapeseed (Brassica campestris L. var. toria) production and productivity in Chitwan, Nepal

  • Shiva P. Rijal PhD student of Institute of Agriculture and Animal Science, TU
  • Resam B. Thapa Professor, Assistant Dean (Emiretus), IAAS, TU, Kathmandu
  • Moha D. Sharma Professor, AFU, Rampur
  • Shrawan K. Sah Professor, AFU, Rampur
  • Yubak Dhoj GC Secretary, Livestock Services, Singh Durbar, Kathmandu
Keywords: Honeybees, Intensive agriculture, Open pollination, Pollinators, Rapeseed, Semi-natural

Abstract

Crop pollination is crucial for increasing yield, ensuring food security and improving livelihoods. To quantify the response of pollinators on rapeseed, an experiment was conducted in randomized complete block design (RCBD) at three agro-ecological sites: Semi-natural (Megauli), organic (Fulbari) and intensive agriculture (Jutpani) Village Development Committees of Chitwan district in 2012/013 and 20013/014. The treatments were: i) open pollination; ii) plants caged with honeybees (Apis melifera L.); iii) hand pollination; and iv) control (plots caged without pollinators) replicated four times. Pollinators visiting rapeseed flowers, plant height, branch number, siliqua/plant, pods weight/ siliqua, test weight, and seed yield/hectare were recorded. The dominant pollinators were Hymenopterans mostly honeybees. The impact of pollinators on each system resulted in significantly increased yield attributes compared to no-pollination, which clearly indicates the need of integrating managed pollination and pollinators' conservation to sustain rapeseed production in Chitwan through biodiversity-based ecosystem services.

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Abstract
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PDF
704
Published
2018-05-12
How to Cite
Rijal, S., Thapa, R., Sharma, M., Sah, S., & GC, Y. (2018). Pollinators diversity and their effects on rapeseed (Brassica campestris L. var. toria) production and productivity in Chitwan, Nepal. Journal of Agriculture and Environment, 18, 151-161. https://doi.org/10.3126/aej.v18i0.19900
Section
Technical Paper