Search Results

Now showing 1 - 3 of 3

Some of the metrics are blocked by your
consent settings
Selection for Upland Rice Varieties Under Different Levels of Light Intensity
(2022-04-01)
Nokkoul, Raumjit
;
Unsup, Karnchanaporn
;
Krutsuwan, Apichart
;
Wichitparp, Thirayut
Upland rice varieties were selected under varying levels of light intensity. This study identified shade-tolerant upland rice varieties with a high yield. From November 2016 to March 2017, the experiment was conducted at King Mongkut's Institute of Technology in Ladkrabang, Prince of Chumphon, Thailand. For this, ten varieties of upland rice i.e. Dawk Pa-yawm, Nangdam, Dokkam, Nangchuan, Lebnokrai, Samduen, Maepeung, Damgatondom, Lebmuenang, Pukaotong were grown at different levels of 0%, 50%, 60%, and 70% shading levels. The experiment was conducted in a randomized complete block design with four replications. The results of qualitative characteristics indicated that shadowing conditions didn’t have any significant effect on plant height, 50% flowering age, harvesting age, and panicle length. On the other hand, shaded conditions have a substantial effect on the number of plants per tiller, the number of panicles per tiller, the number of perfect grains per panicle, and the amount of empty grain per panicle since there was a quantitative character. Among the tested varieties, Lebmuenang, Pukaotong, Damgatondom, and Nangchuan varieties are suited for growing under 50% shade conditions while Samduen was only suited for cultivation in 70 % shaded conditions, whereas Pukaotong was good for growing in 50% and 60% shade situations. The results of this experiment did not encourage farmers to use the other varieties as cultivars under shaded conditions due to low yields. However, the outcomes of this study can be used as a reference for breeding programs in low-light conditions.
Some of the metrics are blocked by your
consent settings
Effect of drought condition on growth, yield and grain quality of upland rice
(2014-07-26)
Nokkoul, Raumjit
;
Wichitparp, Teerayut
Thus, the objective of this study was to investigate the effect of drought condition on growth, yield and grain quality of two varieties in upland rice: Nangdam and Lebnok. The experiment was performed at the King Mongkut's Institute of Technology Ladkrabang, Chumphon Campus, Thailand during July to November, 2010. The study was conducted in randomized complete block design with four replications. This results showed that Nangdam and Labnok varieties were got 12.40-97.10 mm of average monthly rainfall in the vegetative, reproductive and grain formation to ripening stages. Nangdam and Lebnok had days to booting of 72 and 68 Days After Germination (DAG), respectively, days to 50% flowering of 93 and 90 DAG, respectively, which were higher than the normal average of 2 to 6 days. The two tested varieties had low grain yields of 29.12 and 26.20 kg/ha, respectively, when they were grown at the low level rainfall. All varieties had higher number of empty grain of 48 and 33 grain per panicle, respectively, number of low perfect grains of 53 and 57 grain per panicle, respectively, number of imperfect grains of 35 and 30 grain per panicle, respectively, chalky grains of 17.50 and 15.20%, respectively and breaking grains of 0.75 and 2.50%, respectively. However, there were no significant different among those traits between the two varieties. The two varieties of upland rice had smaller grain which was lower than the standard. © 2014 Science Publication.
Some of the metrics are blocked by your
consent settings
Organic upland rice seed production
(2014-01-01)
Nokkoul, Raumjit
The upland rice is popular for growing in southern Thailand because this area is the lowland and less area than other sectors. Upland rice is grown as alternative crops of farmers for household consumption which using organic farming method because organic rice seed can be produced by self-production in farmhouse. However, the upland rice is grown under organic farming system. The seeds must originate from plants being grown in compliance with the organic farming rules for at least one generation. There are many factors involving the production of seeds under organic farming system, making the yield low. Thus, the objective of this study on appropriate methods of upland rice seed production under organic farming system in southern Thailand. The results showed that in producing organic seeds, suitable varieties should be selected to suit each area with regular high yield quality. It can be grown in low fertile soil, resist pests and diseases and compete with weeds. The suitable season should be selected for the seed production and the growing areas ought to be in an ecological zone with at least 14-20 mm of 5-day rainfall during the growing cycle. Soil fertility: crop rotation, green manure plants, compost of rice straw and organic manures. For control of disease and insect pests use of resistant or tolerant varieties, plant extracts, natural enemies. The organic seed production of upland rice in southern Thailand, Samduen variety had suitability for recommendation to seed producer in this area because it can provide high growth, yield and seed quality.

KMITL

Browse

Filters

Settings

Sort By

Results per page

Search Results