行政院農業委員會台南區農業改良場  研究彙報第43號

綠豆噴施落葉劑以利機械收穫之研究

吳昭慧、連大進

摘  要

吳昭慧、連大進。2004。綠豆噴施落葉劑以利機械收穫之研究。台南區農業改良場研究彙報43:47~54。

綠豆籽實產量以春作2月下旬播種,秋作9月上旬播種最高,且第一次成熟率達91%以上。浸水處理對台南5號的落葉率大於不浸水處理,而落葉劑對落葉率的處理效應,又大於浸水處理,不同落葉劑種類以噴施39.5%益收稀釋500倍的落葉率之效果最佳,台南5號及VC6040A分別為95.5∼97.1%及78.7∼89.9%,其次為99%氯酸鈉稀釋400倍。綠豆噴施落葉劑及浸水處理之後7天進行機械收穫,與未處理區人工收穫之種子發芽率,差異均未顯著,顯示種子發芽率不受落葉劑及浸水處理的影響。92年春作綠豆台南5號噴施落葉劑配合機械採收的栽培效益,以採用39.5%益收稀釋500倍每公頃淨收益為25,740元最高,較人工收穫增加29%。

關鍵詞:綠豆、落葉率、播種期、落葉劑。

接受日期:2004年4月13日。


Studies on Defoliants Application for Machine Harvesting in Mungbean

Wu C. H. and T. J. Lien

Summary

Dull mungbean of planting date in the middle of February and first ten-day period of September had higher seed yield and more than 91 % first maturity rate.  The immersion treatment had higher defoliation rate than the check in Tainan No.5.  The defoliant treatment had higher defoliation rate than immersion treatment in Tainan No.5.  The defoliation rate of defoliant treatment with 39.5 % ethythen(diluted 500 times) was higher than the other treatments. The rates were 95.5~97.1 % in Tainan No.5 and 78.7~89.9 % in VC6040A, respectively. Seven days after the defoliant or immersion treatment, dull mungbean could be harvested with machine.  The germination rate of mungbean had no significant difference between treatments. Compared to manual harvest, the defoliant treatment with 39.5 % ethythen (diluted 500 times)for machine harvest was significantly effective, by 29 % increase in net income of 25,740 N.T. $/ha in the dull mungbean Tainan No.5.

Key words : Mungbean, Defoliation rate, Planting date , Defoliants.

Accepted for publication:13 April, 2004.



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