バングラデシュでのわら切り機は、粉砕されたわらが多くの分野で使用できるため、非常に必要とされています。しかし、バングラデシュでのわらの処理には多くの問題があります。
Incomplete straw supply system
バングラデシュのストロー収集には専門的な機械やサービスの仕組みが不足しており、政府は安定した価格体系を確立していません。このような状況では、農民の自発性は高くありません。わらの収集と保管に影響を与える要因は数多くあります。たとえば、天候などの不確実な要因の影響や、保管スペースの建設コストの増加などが挙げられます。これらはすべて、わら資源を均一に収集して配分することを困難にします。
Immature straw collection technology
Straw cutting machine in Bangladesh is rear-mounted with small size and low efficiency, and it is just suitable for dry land. So, it is difficult for straw cutter machine to work in paddy fields. When working, there are such malfunctions as entanglement, clogging of working parts, which makes it impossible to collect relatively high and thick straw such as corn straw and sorghum straw.
The tractor-driven straw cutting machine in Bangladesh is not easy to turn, and is suitable for fields with large space. Moreover, the straw cutting machine and straw baling machine work separately, increasing labor intensity.
Unclear wet storage mechanism
When storing crop straws, the storage stability needs to be considered to reduce losses as much as possible. When the moisture content of the straws exceeds 50%, wet storage and closed environment storage (such as cellars) are usually used.
However, wet storage increases the cost of transportation and processing. Moreover, the conditions and factors affecting wet storage are uncertain and require in-depth research in Bangladesh.
At present, rapid fermentation to produce lactic acid bacteria can be used to reduce the pH value and consume oxygen to form an anaerobic environment. By doing so, the moisture content, pH value and oxygen concentration of the straw during storage time are maintained at the optimal state.
My conclusions and recommendations
1. It is recommended to reach an agreement with the local farmers to store straw jointly.
2. By examining the distribution of farmland, selecting appropriate locations to establish large straw acquisition points.
3. Develop combined straw cutting machine in Bangladesh for small farmland areas with soft soil and much mud.
4.Seek effective and economical storage methods for the straw that is easy firing and mildew during storage time.