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http://dx.doi.org/10.5333/KGFS.2004.24.2.093

Effects of Combined Application of Micronutrients on these Total and Relative Contents, Uptake Amounts, and Mutual Ratios in Orchardgrass and White Clover

Jung, Yeun-Kyu (College of Agric. & Life Science, Sunchon Nat'l Univ.)

Publication Information

Journal of The Korean Society of Grassland and Forage Science / v.24, no.2, 2004 , pp. 93-104 More about this Journal

Abstract

This pot experiment was conducted to investigate the effects of combined micronutrient application( $T_1$ ; control, $T_2$ ; Fe, $T_3$ ; Fe+Mn, $T_4$ ; Fe+Mn+Cu, $T_5$ ; Fe+Mn+Cu+Zn, $T_6$ ; Fe+Mn+Cu+Zn+Mo, T $_{7}$ ; Fe+Mn+Cu+Zn + Mo + B) on forage performance of pure and mixed cultures of orchardgrass and white clover. The fifth part was concerned with the changes in the total and relative contents, uptake amounts, and mutual ratios. of micronutrients in forages. The results obtained are summarized as follows: 1. The relative contents(total contents of 6 micronutrients = 100%) of Fe and Mn were considerably influenced by the antagonism between Fe and Mn, and also were influenced by the differences in Mn-absorption between orchardgrass and white clover. Compared with pure culture, orchardgrass showed high relative contents of Mn, and low relative contents of Fe and B in mixed culture. White clover, however, tended to be exactly opposed to the above trends. In relative contents, the $T$_6$$ 6/ resulted generally in decrease of Fe. However the $T_7$ resulted in increase of Mn and B. In addition, the $T_7$ resulted in decrease of Cu and Zn in orchardgrass, and Mo in white clover. 2. In general, there were differences in the tendency between the yield changes and the uptake amounts of micronutrients. General differences have been showed in the uptake amounts and mutual ratios of micronutrients based on the forage species, pure/mixed culture, additional fertilization, and antagonism. The uptake amounts of total micronutrients were generally increased by the treatments with increased combination. In uptake amounts, the $T_7$ resulted in the increase of Mn and B, and decrease of Mo. 3. The mutual ratios of Fe/Mn, Fe/Cu, and Mn/Cu were considerably influenced by the antagonism between Fe and Mn. At the $T_7$ , very low ratio of Fe/Mo affected by the T6 tended to be somewhat improved because of the decrease of Mo content． The poor growth of forages at the $T_6$ was improved by the $T_7$ . This fact was likely to be caused by the adequate B/Mo ratio.

Orcharduass 및 white clover의 단파 및 혼파재배조건에서 미량요소 Fe, Mn, Cu, Zn, Mo 및 B의 조합시비가 목초의 생육, 개화, 수양, 양분함량 및 식생구성비율 등에 미치는 영향을 구명하였다. 다양요소 양분을 동일량 시비한 조건에서 7 수준의 미량요소 조합시비는 $T_1$ ; 대조구, $T_2$ ; Fe, $T_3$ : Fe+Mn, $T_4$ ; Fe+Mn+Cu, $T_5$ ; Fe+Mn+Cu+Zn, $T_6$ : Fe+Mn+Cu+Zn+Mo 및 $T_7$ ; Fe + Mn +Cu+Zn+Mo + B로 하였다. 본 V보에서는 조합시비가 목초 중 미량요소의 충 함량, 상대함량, 탈취량 및 상호비율의 변화 등에 미치는 영향을 검토하였다. 1) Fe과 Mn-상대함량(총 미량요소 함량=100% 대비)은 이들간의 길항적인 흡수생리와 초종간 he-흡수경합의 차이에 크게 영향을 받았다. orcharduass는 단파에 비해서 혼파재배에서 Mn-상대함량이 더 높았고 B와 Fe-상대함량은 더 낮았으나 white clover는 이와 반대의 경향을 보였다. $T_6$ 6/ 처리에서는 일반적으로 Fe-상대함량의 감소를 보였다. 에서 orchardgrass는 B와 Mn-상대함량의 증가와 Cu와 Zn-상대함량의 감소를 보였으나 white clover는 Mo-상대함량의 감소만 보였다. 2) 미량요소의 탈취량은 일반적으로 수양의 증감에 따른 특성과는 차이를 보였다. 각 미량요소의 탈취량과 미량요소 간 상대함량(당량기준)은 초종， 단파/혼파재배, 추비 및 일부 길항작용의 특성에 따라서 차이를 보였다. 총 미량요소의 탈취량은 일반적으로 증가되는 조합시비 처리에 따라서 증가하였다. Mn을 시비한 조합시비에서는 수양의 면화보다 Fe-탈취량이 상대적으로 더 낮았고 Mn-탈취량은 더 높았다. $T_7$ 처리로 Mn과 B-탈취량은 증가하였고 Mo-탈취량은 감소되었다. 3) Fe/Mn， Fe/Cu와 Mn/Cu 비율은 길항적인 Fe과 Mn 간의 흡수경합에 따라서 크게 영향을 받았다. $T_6$ 처리에 의해서 Fe/Mo 비율은 크게 낮아졌고 이 비율은 $T_7$ 처리로 Mo 함량의 감소와 더불어 다소 높아졌다. B/Mo 비율은 orchardgrass보다 특히 white clover에서 높았고 $T_6$ 에서의 생육불량/황화현상이 $T_7$ 처리에서 양호해진 것은 높아진 B/Mo 비율과도 연관된 것으로 보였다.

Keywords

Orchardgrass; White clover; Total contents; Uptake amounts; and Mutual ratios of micronutrients; Fe; Mn; Cu; Zn; Mo; B;

Citations & Related Records

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