Combine의 扱胴速度 및 脫穀時 벼의 含水率이 發芽에 미치는 影響에 關한 硏究 = A Study on the Influence of Germination by Drum Speed of Combine and Rice Moisture Contents Ratio at the Time of Threshing

국문 초록 (Abstract)

統一系品種 豊産벼와 一般系品種 東津벼를 生脫穀, 乾脫穀 合해 脫穀時 벼의 含水率 5個 水準으로 콤바인 扱胴速度를 300, 400, 500, 600rpm의 4個 水準으로 脫穀하여 쭉정이만을 風구로 除去하고 授取한 試料와 쭉정이, 開穎米, 胴割米 等까지 除去한 完全히 選別된 벼 100粒씩 30℃물에서 3日間 浸種시켜 育苗機에 5日間 發芽시켜본바 다음과 같은 結論을 얻었다.
1. 一般系統 東津벼는 統一系統 豊産벼보다 같은 扱胴速度에서 比較的 높은 發芽率을 보이며 脫穀時 벼의 含水率이 적을때 脫穀할수록 發芽率이 높다.
2. 統一系統 豊産벼는 生脫穀이 乾脫穀일때 보다는 發芽率에 있어서 상당히 적은 量으로 나타난다.
3. 統一系統 豊産벼의 境遇 無選別벼의 發芽率은 含水率이 20% 以下에서 生脫穀일때 發芽率이 最高 39% 乾脫穀일때 含水率이 第一 적은 14.89%에서 最高 88%가 나타난다.
4. 一般系統 東津벼의 境遇 無選別벼의 發芽率은 벼의 含水率 20% 以上에서 生脫穀할때 最高 56%, 乾脫穀일때 含水率이 가장 낮은 17.05%에서 最高 89%까지 發芽했다.
5. 豊産벼나 東津벼 共히 扱胴速度 600rpm에서 脫穀할때 500rpm 以下로 脫穀할때 보다도 發芽率이 顯著히 低下한다.
6. 豊産벼의 境遇 70%以上의 發芽率을 얻으려면 벼의 含水率 17% 以下에서 扱胴速度 400rpm以下로 脫穀해야 한다.
7. 東津벼는 벼의 含水率 18%以下에서 扱胴速度 400rpm 以下로 낮추면 70%以上이 發芽가 된다.
結論的으로 種子用벼로서는 콤바인 脫穀인 生脫穀보다는 乾脫穀하는 것이 發芽가 좋으며 含水率이 可能한한 적고 낮은 扱胴速度로 脫穀해야 만이 發芽가 많이 된다.

다국어 초록 (Multilingual Abstract)

A germination experiment of 100 grains of selected materials excluding only immature rice and those of completely selected materials excluding immature film-opened, and notched-belly rice kernel of Pungsan variety of Indica type and Dongjin variety of Japonica type was conducted with a raising-seedling machine. The varieties collected were threshed at 4 levels of drum speed of combine(300, 400, 500, 600rpm) and at 5 levels of rice moisture contents ration, and were soaked in 30℃ water.
The results are summarized as follows;
1. Dongjin variety of Japonica type germinated high in comparison with Pungsan variety of Indica type at the same drum speed and germination ratio is high when rice moisture contents ratio is low at threshing time.
2. Pungsan variety of Indica type turns out in smaller quantity in germination ratio of wet-paddy threshing than dry-paddy threshing.
3. Germination ratio of non-selected rice is 39% at maximam in wet-paddy threshing when rice moisture contents ratio is lower than 20%, and maximam of 88% in the least rice moisture ratio of 14.89% in dry-paddy threshing in pungsan variety of Indica type.
4. Germination ratio of non-selected rice is 56% at maximum in wet-paeey threshing when rice moisture contents ratio is lower than 20%, and 89% at maximum in the least rice moisture ratio of 17.05% at dry-paddy threshing in Dongjin variety of Japonica type.
5. Both germination ratio of pungsan variety and Dongjin variety were lowered pretty more at drum speed of 600 rpm than 500 rpm or less when threshing.
6. For obtaining germination ratio over 70% in Pungsan variety, it must be threshed at drum speed 400 rpm or less when rice moisture contents ratio is low by 17%.
7. More than 70% of Dongjin variety germinated if it is threshed at drum speed 400 rpm or less at rice moisture contents ratio 18% or less.

In conclusion rice for seed germinates better when dry-paddy threshing than wet-paddy threshig with a combine, and it germinates much when rice moisture contents ratio is low and when threshed drum speed as low as possible.

목차 (Table of Contents)

• 1. 緖 論
• 2. 文獻槪要
• 3. 材料 및 方法
• 4. 結果 및 考察
• 5. 摘 要
• 參考文獻