??????????????????????????????????????????????????????????????????????????????????????????????? | Management of chemical fertilizers based on soil analysis with soil amendments to increase the yield of water convolvulus (Ipomoea aquatica) in Takhli soil series
2019
Sirisuda Bootpetch(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Agriculture at Kamphaeng Saen. Department of Soil Science) | Thamthawat Saengngam(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Agriculture at Kamphaeng Saen. Research and Academic Service Center. Kanchanaburi Research Station) | Anut Hengcharoen(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Agriculture at Kamphaeng Saen. Department of Soil Science)
Currently, only a large amount of chemical fertilizers are used for food plant production. Which is a high production cost. Therefore, this experiment was intended to use chemical fertilizers combined with soil amendments to increase the yield of water convolvulus in Takhli soil series. The experiment was designed in Randomized Complete Block Design (RCBD) with 3 replications and 11 treatments. The results showed that the water convolvulus at harvest (28 days), fresh weight, dry weight and yield were highly significant different. The application of chemical fertilizers at ? of soil analysis in combination with soil amendments rate of 50 kg/rai (T10), provided the highest of fresh weight, dry weight and total yield. It also provided the highest profit of 8,263 baht/rai and could make investment decisions due to B/C ratio >= 1 was equal to 2.51. While the chemical fertilizer at ? of soil analysis in combination with soil amendments rate of 75 kg/rai (T11), provided the highest of organic matter content (3.41 percent), total nitrogen content (0.20 percent) and CEC (23.56 cmol/kg).The application of chemical fertilizers at ? of soil analysis combined with soil amendments at the rate of 50 kg/rai (T10), could reduce the use of chemical fertilizers and increase the yield of water convolvulus rather than using only chemical fertilizers
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