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유기농법(有機農法)에 관(關)한 연구(硏究) - I. 유기농법(有機農法) 답포장(畓圃場)에서의 절지동물상(節肢動物相) 조사(調査) -
李龍煥 ( Lee Yong Hwan ),高賢寬 ( Goh Hyun Gwan ),黃光男 ( Hwang Kwang Nan ),胡敎純 ( Ho Qyo Soon ) 한국유기농업학회 1998 韓國有機農業學會誌 Vol.6 No.2
Organically cultured rice fields were surveyed to compare the population density and the structure of microarthropod communities between chemically controlled and uncontrolled fields. In rice fields, microarthropod communities were also compared among four treatments based on different input of fertilizer : 1)No fertilizer, 2)Chemical fertilizer (N-P2O5-K20 = 11-7-5kg/10a). 3)Compost(5.000kg/10a). 4) complemented with chemical N. Richness index of microarthropod communities in rice fields was greater in the chemically uncontrolled field than controlled field. Within field, the compost plot had greater value of richness index for microarthropod communities than the non-fertilizer polt. A total of 9 aquatic insects species were identified in the water of organic farming rice field the population density was found to be higher in the compost plot than the other plot. The population of insect pests was found to be high in the late stage of plant whereas the population of insects was high in the early stage of rice plant.
퇴비(堆肥) 시용(施用)이 미질특성(米質特性)에 미치는 영향(影響)
李龍煥 ( Lee Yong-hwan ),蘇奎鎬 ( So Kyu-ho ),黃光男 ( Hwang Kwang-nam ),胡敎純 ( Ho Qyo-soon ) 한국유기농업학회 1997 韓國有機農業學會誌 Vol.6 No.1
For the environmental protection, it is more desirable to use compost rather than chemical fertilizer. So in this paper, the effects of compost upon the rice qualiity were investigated with Hwajin Rice as the test variety. The rice quality and physicochemical characteristics were examined and the results are as follows. As to the rice quality, the rate of polished rice was high in the non-fertilizer and the compost plot, the degree of transparency was high in the order of the traditional, the compost+urea, the compost and the non-fertilizer plot. The amylose content (one of the physicochemical characteristies of the rice),the rate of Mg/K, and the adhesivity and the cohesion power (charateristies of texturogram which show the density of boiled rice) were also high in the compost polt. Among the amylogram characteristics, the gelatinization temperature was lowest in the compost plot ; the lowest and the highest degree of viscosity and the break down were also inclined to be higher in the compost plot than in the traditional plot. After the soil test, the components of available phosphorus, organic matters, calcium, magnesium, potassinm and silicate increased in the soil as compared with those before test.