Impact of temperature and soil moisture on paddy weed and productivity: A case of Lalitpur District, Nepal

Authors

  • Ambika Ghimire Central Department of Environmental Science, Tribhuvan University (TU), Kathmandu, Nepal https://orcid.org/0000-0002-9545-996X
  • Binod Baniya Department of Environmental Science, Patan Multiple Campus, TU, Kathmandu, Nepal; Land Surface Processes and Global Change Research Group, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China https://orcid.org/0000-0003-2827-0152
  • Yubak Dhoj GC Food and Agriculture Organization, Regional Office, Bangkok
  • Anup KC Department of Environmental Science, Amrit Campus, TU, Kathmandu, Nepal; Department of Parks, Recreation, and Tourism Management, Clemson University, SC, US https://orcid.org/0000-0003-1470-4511

DOI:

https://doi.org/10.3126/njes.v10i1.36659

Keywords:

Moisture, productivity, rice, temperature, weed

Abstract

Rice (Oryza sativa L.) is a major food crop for around 60% of the global population. The production of rice has been challenged by various biotic and abiotic factors. Temperature and soil moisture are the major abiotic and weeds are the major biotic factors for yield loss. The present experiment was conducted to investigate the impact of temperature and soil moisture on rice weed and rice productivity. The experiment was carried out under different temperatures (ambient, ambient +2°C, and ambient +3°C) and soil moisture (ambient, 25-30%, and 10-15%) conditions for the entire crop growth period from June to October 2014. Rice weeds were recorded after 28, 47 and 93 days of rice transplantation for varied soil moisture. Similarly, at varied temperature weeds were recorded after 19, 44 and 66 days of rice transplantation. The results showed that weed density increases under elevated temperature at 2°C and 3°C than under an ambient condition (existing in the surrounding area). An experiment on soil moisture stress indicates a reduction in rice productivity as the density of weed increases with the deficiency of soil moisture. Further studies on temperature and soil moisture resisting rice variety are essential. This study suggests that research on the control of weed species, targeting those weeds benefited at elevated temperature and soil moisture stress conditions, is necessary.

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Published

2022-06-29

How to Cite

Ghimire, A., Baniya, B., GC, Y. D., & KC, A. (2022). Impact of temperature and soil moisture on paddy weed and productivity: A case of Lalitpur District, Nepal. Nepal Journal of Environmental Science, 10(1), 11–22. https://doi.org/10.3126/njes.v10i1.36659

Issue

Section

Research Articles