Effects of gypsum, chicken manure and chemical fertilizer on root yield and starch content of Kasetsart 50 and Huay Bong 60 cassava planted in late rainy season | เธเธฅเธเธญเธ เธขเธดเธเธเธฑเนเธก เธเธธเนเธขเธกเธนเธฅเนเธเน เนเธฅเธฐเธเธธเนเธขเนเธเธกเธต เธเธตเนเธกเธตเธเนเธญเธเธฅเธเธฅเธดเธเธซเธฑเธงเธชเธเนเธฅเธฐเธเธฃเธดเธกเธฒเธเนเธเนเธเธเธญเธเธกเธฑเธเธชเธณเธเธฐเธซเธฅเธฑเธเธเธฑเธเธเธธเนเนเธเธฉเธเธฃเธจเธฒเธชเธเธฃเน 50 เนเธฅเธฐเธเธฑเธเธเธธเนเธซเนเธงเธขเธเธ 60 เธเธตเนเธเธฅเธนเธเนเธเธเนเธงเธเธเธฅเธฒเธขเธคเธเธนเธเธ
2007
Prapart Changlek(Kasetsart University, Bangkok (Thailand). Agro-Ecological System Research and Development. Phetchaboon Research Station) E-mail:[email protected] | Vichan Vichukit(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Agriculture. Department of Agronomy) | Ed Sarobol(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Agriculture. Department of Agronomy) | Sumed tubngein(Kasetsart University, Bangkok (Thailand). Inseechandrasatitya Institute for Crop Research. Kao Hin Sorn Research Station) | Sudprasong Suwannalert(Kasetsart University, Bangkok (Thailand). Agro-Ecological System Research and Development. Sittiponkitdakon Research Station) | Preecha Phetprapai(Thai Tapioca Development Institute, Nakhon Ratchasima (Thailand). Tapioca Research and Development Center)
Study the effects of gypsum(G), chicken manure (CM), and chemical fertilizers (F), on root yield and starch content of Kasetsart 50 and Huay Bong 60 cassava planted in late rainy season, the experiment was conducted at Tapioca Research and Development Center (TRDC), Huay Bong Sub District, Dankhuntoad District, Nakhon Ratchasima Province on October 23, 2003. The experimental design was a split-plot in RCB designs with 4 replications. The cassava cultivars, Kasetsart 50 and Huay Bong 60 were the main plots. The 14 sub-plots were: T1=non of G, CM and F (control), T2=50 kg F/rai, T3 =1 ton CM/rai, T4=250 kg G/rai T5=1 ton CM/rai+25 kg F/rai, T6 =1 ton CM/rai 250 kg G/rai, T7-T10 each received 50 kg F/rai but obtained different G rates (100, 150, 200 and 250 kg/rai, respectively), T11-T14 each was given 0.5 ton CM/rai+25 kg F/rai but received different G rates (100, 150, 200 and 250 kg/rai, respectively). The results indicated that the average fresh root yield of two cassava cultivars were not statistically different. The treatment that receive gypsum, CM and F alone, CM+F, G+CM, different 4 rates of G+F and different 4 rates of G+CM+F increase cassava root yield (40-64 percent over control). Gypsum at the rate of 100 kg/rai+50 kg F/rai (T7)gave maximum root yield of 7,891 kg/rai as compared with the control where cassava root yield was the lowest (4,810 kg/rai). Root starch content of Kasetsart 50 was slightly greater (26.8 percent) than Huay Bong 60(25.6 percent). The stem+leaf fresh weight of Huay Bong 60 was greater (6,701 kg/rai) than Kasetsart 50 (4,783 kg/rai).
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