Effects of harvesting dates on different characters and seed quality of peanut grown in Southern Thailand
1997
Sarat Sattayarak | Paisant Laosuwan (Prince of Songkla Univ. (Thailand). Faculty of Natural Resources)
This study was aimed to investigate the effect of harvesting periods on various characters of groundnut grown in Phatthalung and Songkhla provinces. A split-plot design was used. Six peanut varieties including, Tainan 9, Khon Kaen 60-1, Lampang, Tainung 2, RCM 387, and S.K.38, were the main-plots and 5 harvesting dates including, 88 98 108 118 and 128 days after planting, were the sub-plots. The result showed that peanut variety RCM387 gave the highest pod yield of 306 kg/rai (1 rai = 0.16 ha). Among recommended varieties, Tainan 9 gave the highest pod yield of 240 kg/rai. Harvesting dates exhibited certain effects on yield, 100 seed weight, shelling percentage, oil and protein contents. The highest yield was obtained from peanut harvested at 98 days after planting. The most suitable harvesting dates for most varieties were 98-108 days except for RCM 387 that should be harvested at 118 days. The peanut pods were classified into four development stages that is very young pods, immature pods, mature pods and over-mature pods. The suitable harvesting periods of most varieties that the proportion of mature pods was highest were 98 days after planting. The highest germination percentages of all varieties were found among 88 and 98 days after planting. These findings indicate that immature seeds of peanut can be used as seeds.
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