| Autor: |
Khan, M. Shahabuddin, Sen, Ranjit, Noor, Shamsun, Naser, Habib Mohammad, Alam, Md. Khairul |
| Zdroj: |
Climate Change & Food Security in South Asia; 2011, p515-526, 12p |
| Abstrakt: |
The crop production situation in Bangladesh is becoming worse due to a range of soil, water and climate related constraints. Global warming and climate change phenomena exacerbate this situation. Declining soil fertility, accelerated soil erosion and soil salinity are the major soil related constraints to crop production. About 0.87 million hectares (Mha) of land is affected by different degrees of salinity and about 1.74 Mha is prone to soil erosion. The rise of 3°C atmospheric temperature would cause an 11% decrease in soil organic matter (SOM) content. Judicious use of chemical fertilizer and increasing use of organic manure with legume based cropping pattern can restore soil fertility. Shortage of water in the dry season and abundance of water in the rainy season are the main water-related -constraints. Winter (boro) season rice cultivation using a huge amount of ground water creates arsenic contamination in soil and water. Less water consumptive crops should be selected in the rabi season. Climatic changes results in natural hazards like floods, drought and cyclones. Short duration and increasing temperature are the recent trends of the winter season in Bangladesh. Therefore, appropriate crop variety (heat and salt tolerant), improved crop management, fertilizer use, water management and agronomic practices are needed to alleviate these constraints. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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