유채 종실을 이용한 뿌리혹선충의 친환경적 방제
Environmentally-friendly Control of Soil Nematode by Crashed-rape (Brassica naptus) seed
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초록
잘게 부순 유채씨를 토양에 처리하여 토양중의 선충을 친환경적으로 방제하고 오이의 수량을 높이고자 2007년부터2009년까지 3년간 시험한 결과 토양에 유채종실의 시용량이많을수록 처리 후 50일에 토양 중 cyanate의 량이 많은 것을 볼 수 있었는데 유채 200 kg/10a을 시용한 토양 중thiocyanate의 량은 30 mg/kg, 400 kg/10a을 시용한 토양은 40 mg/kg 으로 조사되었다. 토양선충 밀도는 관행의경우 토양 300 g당 463 마리로 피해유발 수준인 150마리보다 보다 훨씬 높은 밀도로 가시적인 피해가 나타났으나 유채를 처리한 모든 시험구 토양의 경우 토양 300 g당 13~17마리로 뿌리혹 선충의 피해는 나타나지 않았다. 수량은 유채 시 용량이 많을수록 6~15% 증수하는 경향이나 선충 피해 예방과 경제성을 고려할 때 10a당 200 kg를 시용하는 것이 좋을것으로 사료되었다.
Abstract
The present studies were carried out for three years from 2007 until 2009 to control nematode and to increase yield of cucumber by crashed-rape seed application at polyethylene film house. Crashed-rape seed has a lot of glucosinolate. Myrosinase decompose gulcosinolate into isothiocyanate and thiocyanate when crashed-rape seed go to decay at soil. Those chemical compounds act on poison to nematode at soil. When the crashed-rape seed treated at soil, an amount of thiocyanate at soil was risen up. Thiocyanate of plot treated with 200 and 400 kg crashed-rape seed per 10a was 30 and 40 mg/kg, respectively. Nematode(meloidogyne spp) population at soil was 13 to 17 nematodes per dried soil 300g. Yield of cucumber increased 6 to 15 percent to be compared with control. While, Nematode(meloidogyne spp) population of control plot were 463 nematodes per dried soil 300 g. This level was much higher than 150 nematodes which can be brought about injury to plant. Even if the more an amount of crashed-rape seed application, the higher yield of cucumber and control effect of nematode. Consider economical efficiency, 200 kg of crashed-rape seed per 10a was the most effective. Therefore, we suggest applying 200 kg of crashed-rape seed per 10a to control soil nematode when culture cucumber at plastic film house.
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