このエントリーをはてなブックマークに追加
ID 33186
本文ファイル
著者
Khanal, Narayan Prasad
Maharjan, Keshav Lall
Dangol, Dharma Raj
NDC
農業
抄録(英)
Declining crop productivity and environmental pollution are two key issues associated with sustainability of rice-wheat system in Nepal. The former one is related to declining soil organic matter and shortage of water as well as laborer; whereas, the latter is due to emission of greenhouse gases (GHGs) from this system. This article reviews the potential of soil conservation practices, especially organic matter and zero-tillage, against these two issues in rice-wheat system of Nepal. Farm Yard Manure (FYM), compost and green manure are the major sources of organic matters in rice-wheat system in Nepal. The organic matter improves the physical, chemical and biological properties of soil; and contributes in minimizing GHG emission. Adoption of biogas technology, improved FYM/compost and spring season green manure crops hold enormous potential to minimize GHGs emission from rice-wheat system. Similarly, zero-tillage reduces the cost of cultivation, allows early planting of wheat, reduces water requirement and increases the crop yield by 16-50 % as compared to conventional tillage. This practice also reduces the consumption of fossil fuel (up to 64 %) by reducing the tillage requirement, and minimizes the oxidation of soil organic matter, thereby contributing in the GHGs mitigation. The other options contributing to the above two issues are water, land, and fertilizer management, and upland rice varieties. This review shows that the integration of the above options would contribute in sustainability of the production system and environmental but more understanding is needed regarding the applicability of the zerotillage using seed drill in wheat under different geographical and socio-economic contexts of Nepal given the limited studies available.
掲載誌名
国際協力研究誌
18巻
4号
開始ページ
11
終了ページ
20
出版年月日
2012-06-30
出版者
広島大学大学院国際協力研究科
ISSN
1341-0903
NCID
SelfDOI
言語
英語
NII資源タイプ
紀要論文
広大資料タイプ
学内刊行物(紀要等)
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
部局名
国際協力研究科
他の一覧