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RISS 인기검색어
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- 저자 : 김정갑 ( Yeun Kyu Jung (검색결과 1 건)
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석회 및 3 요소 시용수준이 겉뿌림 산지초지에 미치는 영향 2 . 수량구성요소 식생구성비율 및 목초율의 변화
정연규,윤상기,김정갑 ( Yeun Kyu Jung,Sang Gi Yun,Jeong Gab Kim ) 한국축산학회 1982 한국축산학회지 Vol.24 No.6
This field experiment was undertaken to assess the effects of two rates of Ca(OH)₂ (0, 250 ㎏/l0a) and five rates of N-P₂O_5-K₂O (0-0-0, 0-10-10, 6-15-15, 12-20-20, 24-25-20 ㎏/l0a) on the grassland establishment, forage yield and quality, botanical composition,, and persistence of different forage species in a mixed grass/ clover sward established by oversowing method on new reclaimed steep mountain. This second part is concerned with the yield components, botanical composition, and performance of different grass species. The results obtained were summarized as follows; 1. Yields and botanical compositions of grasses and legume, and rate of seeded forages in mixed sward were greatly increased by liming. The yield and botanical composition of weeds were reduced by both liming and increasing the NPK rate. By increasing the NPK rate, the yield and botanical composition of grasses, and the rate of seeded forages were greatly increased. The regrowth of cut shrubs was controlled by both lime and NPK applications The rate of yield increase of grasses in mixed sward by increasing the NPK rates tended to be relative higher with liming than no lime. 2. At no lime, legume in mixed sward was almost disappeard, and no significant effect of NPK application on persistence of legume was found. On the other hand, legume in mixed sward was good established by liming, and that yield and botanical composition were highest with 6-15-15 (N-P₂O_5-K₂O ㎏/l0a) rate. The yield of weeds in mixed sward was highest with low rates of NPK, and that reduced with control and moderate rate of NPK. 3. Lowest application rates of N-P₂O_5-K₂O to maintain the above 50% in the mean rate of seeded forages were 12-20-20 ㎏/l0a rate at no lime and 6-10-10 rate at liming. Increments of rate of seeded forages and legume as affected by liming resulted in the forage production with good quality. 4. Mean botanical compositions of the seeded different grass species (∑ grass=100%) in a mixed grass/clover sward were highest in the following order; Orchardgrass (65%)$gt;Tall, Meadow and Red feseues (25%)$gt; Redtop (4.5%)$gt;K. bluegrass (4%)$gt;P. ryegrass (1.5%). Liming increased gently mean botanical composition of Fescues and reduced that of Redtop in seeded grasses, while these of Orchardgrass, K. bluegrass, and P. ryegrass were inconsistent. By increasing the NPK rate, that was increased markedly in Orchardgrass and gently in Fescues, whereas that tended to be reduced in other grass species.
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