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방사오리의 접촉자극이 벼 생육 , 내도복성 및 수량에 미치는 영향
고병대(Byeong Dae Goh),중서양효(Yoshitaka Nakanishu),만전정치(Masaharu Manda),송영한(Young Han Song) 한국환경농학회 2001 한국환경농학회지 Vol.20 No.4
This study was conducted to clarify the effects of physical stimulation to the rice plant by free-ranging ducks (Chinese native ducks) on growth, lodging resistance and yield of the rice plants in a rice-duck farming system. Two paddy fields were used for this experiment, one exposed to physical stimulation (PS) and the other with no physical stimulation (NPS). Fifteen days after ducks were introduced into the paddy plot, rice plants in the PS field were significantly (P<0.05) shorter than those in the NPS field. Measurements of lodging characteristics showed that, the 3rd internode was significantly (P<0.05) shorter in the PS treatment than in the NPS treatment, but neither the 4th internode length nor the center of gravity of the rice plants differed between treatments. The breaking strength of N₄ in PS rice was significantly (P<0.05) higher than in NPS rice, however the bending moment and the lodging index of N₃ (distance between fulcra - 5 ㎝) was significantly (P<0.05) lower in PS than in NPS. The number of panicles per ㎡ was significantly (P<0.05) greater in PS rice than in NPS, but there was no such difference in spikelet number per panicle, percentage of ripened grain or weight per 1000 kernels. Paddy rice yield per ㎡ in the PS treatment was significantly (P<0.05) higher than that in the NPS treatment.
기타 : 오리 순치방법이 논 방사후 행동과 벼 수량에 미치는 영향
고병대 ( Go Byeong Dae ),전원유기 ( Jeon Won Yu Gi ),만전정치 ( Man Jeon Jeong Chi ),송영한 ( Song Yeong Han ) 한국축산학회 2003 한국축산학회지 Vol.45 No.4
Early introducing the ducks into the paddy field involves a variety of environmental changes such as new surroundings and contact with water, so that some free-ranged ducks show behavioral and physiological changes indicative of stress or dic from not adapted for new circumstances. Moreover, th free-ranged ducks was tread on the rice plant, and required a great deal of labor and time for captured the ducks after finishing duckling on behavior patterns, body weight gain and yield of the rice plant in paddy fields. Three paddy plots were used as control (no imprinting and no contact with people), taming (imprinting and regular handling) and roughness (handling roughly and strike terror to ducks) plots. Right after introducing the ducks into the paddy field, eating and moving behaviour of taming plot ducks tended to be longer time spend than that of other treatments. However, eating and moving time tended to be longer in the control than that of other two treatments on the 2 weeks after. Flighting distance was not showed in the free-ranging period taming plot, but the control plot, but the control plot was significantly (P<0.05) longer than the and roughness plots. Body weight gains was not significant. The number of rice plants damaged by free-ranging ducks in the taming plot were significantly (P<0.05) less than that in the control plot, but the yield and yield components of the rice plant were not differ among 3 treatments. These results indicated that the imprinting or regular handling and related treatments of duckling was reducing badly damage of rice plants, captured time and labor of free-ranged ducks in paddy field, although the working behavior of ducks and yield ability of the rice plants were not affected.