Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Evaluation of Aquatic Animals on the Water in a Rice Field with No-tillage Rice Cover Crop Cropping Systems

무경운 피복작물 작부체계에서 논물의 미소동물 평가

  • Lee, Young-Han (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Sonn, Yeon-Kyu (National Academy of Agricultural Science, RDA)
  • Received : 2011.05.19
  • Accepted : 2011.06.10
  • Published : 2011.06.30
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Abstract

The objectives of the present study evaluated aquatic animals on the water in a rice field. Field investigation was carried out in conventional tillage without rice straw or green manure crop treatment (CTFS, check plot), no-tillage without cover crops (NTNT), no-tillage amended with rape (NTRA), no-tillage amended with rye (NTRY), no-tillage amended with hairyvetch (NTHV), and no-tillage amended with Chinese milk vetch (NTCM). Total dense population of aquatic animals in HTHV was significantly higher than the other plots (p<0.05) on May 30. Dense populations of Daphniidae and Culicidae on June 20 were lowest in CTFS compared to no-tillage plots (p<0.05). Furthermore, in principal component analysis (PCA), PC1 explained 44.9% of variance, whereas PC2 explained 26%, for a cumulative total of 70.9% and the PC1 of the PCA separated the samples from NT treatments and CFS (p<0.05).

벼 유기농업을 실천하기 위하여 무경운 논에서 피복작물로 자운영, 볏짚, 헤어리베치, 유채 및 호밀 등을 처리하고 논물의 미소동물 개체수의 변화를 검토코자 수행하였다. 이앙전 5월 30일 논물의 미소동물 개체수는 무경운 헤어리 배치 처리구가 관행, 무경운 자운영 처리, 무경운 유채 처리, 무경운 호밀 처리 및 무경운 녹비 무처리에 비해 유의적으로 많았다 (p<0.05). 이앙후 6월 20일 논물의 물벼룩과 모기유충 개체수는 관행이 무경운 처리구에 비해 유의적으로 낮았다 (p<0.05). 주성분 분석결과 관행은 무경운 처리구와 유의적으로 차이가 있었으며 무경운 처리에서는 무경운 자운영 처리와 무경운 헤어리베치 처리가 무경운 녹비 무처리, 무경운 유채 처리 및 무경운 호밀 처리구와 유의적인 차이가 있었다. 무경운 논에서 유기물 투입이 논물의 미소동물 개체수 증가에 기여하였으며 분해가 느린 호밀과 유채 보다 분해가 빠른 두과작물이 미소동물 개체수 증가에 유리하였고 벼 유기농업의 지표로 물벼룩의 개체수를 적용할 수 있을 것으로 판단된다.

Keywords

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