Increase of resistance of KDML 105 rice variety to the brown planthopper, Nilaparvata lugens (Stal), by using socond F-1
2001
Nipha Chansrisommai(Department of Agriculture, Bangkok (Thailand). Entomology and Zoology Div. Rice and Temperate Cereal Entomology Research Group) | Prapai Chairoj(Department of Agriculture, Bangkok (Thailand). Soil Science Div.) | Kanchana Po-ngeon(Department of Agriculture, Bangkok (Thailand). Botony and Weed Science Div.)
Socond F-1, as a soil conditioner, is composed of silica and it has been claimed to increase rice plants resistance to the hoppers and the stem borers and finally to lead to the increase of rice yield. This study was carried out to prove that Socond F-1 could increase the resistance of KDML 105, the most popular exporting rice variety, to the brown planthopper (BPH). The experiment was conducted both in greenhouse and in the paddy field at Pakred district in Nonthaburi province. Socond F-1 was mixed with ammonium phosphate fertilizer (16-20-0) at the ratio of 1:1 and applied only once at 20-25 days after sowing: BPH responses to treated rice were observed at 10-15 days after application. Responses of rice plants to the application of Socond F-1 on the numbers of tillering, the height, silica contents in the leaves and stems, and rice yields were observed and compared with those applied with chemical fertilizer alone. The results showed that the population increases of BPH, number of tillering and the height of rice plants treated with Socond F-1 comparing with chemical fertilizer were not significantly different. Rice plants of both treatments were susceptible to BPH infestation. Rice yields in the field of Socond F-1 treatment, 363 kg/rai (1 rai = 0.16 hectare), was less than that of chemical fertilizer treatment, 512 kg/rai, which coincided with greenhouses result. There were no difference in silica content in root and stem, and in the thickness of epidermal cell of leaf and stem in Socond F-1 and chemical fertilizer treatments. It was concluded from this experiment that Socond F-1 could not strengthen plant tissue or increase rice yield of KDML 105 variety.
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Эту запись предоставил Kasetsart University