http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 장병호 ( Chang Ju Kim (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
-
혼파목초지에 있어서 하계의 예취간격이 목초생육 및 건물수량에 미치는 영향
김창주,장병호 ( Chang Ju Kim,Beong Ho Chang ) 한국축산학회 1976 한국축산학회지 Vol.18 No.5
In the interest of determining the optimum cutting intervals under the settled cutting times in mixture sward in summer season, an experiment was conducted during the period from April 1972 to October 1972 at Kangwon National University, Chunchon. Each plot, was sown with seeds mixture of orchardgrass 20 ㎏/㏊+perennial ryegrass 10㎏/㏊+ladino clover 3㎏/㏊ on 24th of April, 1972 and the first cut carried out on 11th of June and the third cut practiced 100 days after the first cut that that fell on 16th of September. The date of the second cut differed plot by plot, that was 35 days (T₁), 45 days (T₂), 55 days (T₃) or 65 days (T₄) after the first cut. The results obtained were summarized as follows: 1. Average number of established plants and average ratio of establishmend of the each plot were 197.2 plant/dm^2 and 95.4% in orchardgrass, 30.8 plant/dm^2 and 74.2% in perennial ryegrass and 24.9 pland/dm^2 and 59.6% in ladino clover. 2. Length of the pasture plants green longer as the cutting interval lengthened. Yet, when the cutting interval was prolonged more than 55 days, the plant length of perennial ryegrass rather shortened because of the plant death with excessive growth. 3. As the cutting interval elongated the difference of plant length between orchardgrass and perennial ryegrass was more remarkable. Namely, orchardgrass was larger than perennial ryegrass by 4.5 ㎝ in T₁ plot, 9.1 ㎝ in T₂ plot, 22.1 ㎝ in T₃ plot and 24.7 ㎝ in T₄ plot at the second cut; the former was longer than latter by 18.4 ㎝ in T₄ plot, 29.3 ㎝ is T₃ plot, 30.2 ㎝ in T₂ plot and 31.4 ㎝ in T₁ plot at the third cut. Therefore perennial ryegrass eras at greater disadvantage in the light competition with orchardgrass as the cutting interval lengthened, 4. The shorter cutting interval the higher relative light intensity in the plant community. The relative light intensity of the each plot was 35.1∼37.2% at the first cut, 15.7∼27.5% at the second cut and 18.0∼24.8% at the third cut. 5. During the summer season, higher decreasing rate of tiller or stolon number was marked in the plots cut at longer interval between the second cut and the third cut; the decreasing rate was 12.3∼65.7% in orchardgrass and 37.8∼75.4% in perennial ryegrass. The decreasing rate of stolon number in ladino clover was 42.0∼55.9% during the summer season. 6. In dry matter yield at the second cut and the third cut and the third cut, T₂ plot marked the largest yield among all plots, and the T₂ plot showed also the highest yield. The greatest yield of dry matter was obtained when the cutting interval between the first cut and the second cut and between the second cut and the third cut was settled on 45 days and 55 days respectively. 7. In annual dry matter yield, 10.33 t/㏊ of T₂ plot and 9.78 t/㏊ of T₃ plot had comparatively balanced cutting intervals were significantly larger than 9.08 t/㏊ of T₁ plot and 7.89 t/㏊ of T₄ plot which had unbalanced cutting intervals (P$lt;0.05). 8. Dead material had a tendency to increase in proportion to lengthening of cutting interval. The amount of dead material was 0.09∼0.61 t/㏊ (2.6∼12.6% of the dry matter yield) in the second cut and 0.00∼0.19 t/㏊ (0.0∼5.4% of the dry matter yield) in the third cut. 9. Weed was produced only at the third cut; larger amount of weed was produced in the plot which had longer cutting interval. At the third cut, the dry matter yield of weed was 0.02∼0.64 t/㏊ (1.0∼19.4% of the pasture plants). 10. In botanical composition at the second cut, orchardgrass ratio which ranged 58.2∼80.9% increased but perennial ryegrass ratio which ranged 9.7∼35.4% decreased as the cutting interval elongated; at the third cut, when the cutting interval extended to more t than 55 days orchardgrass ratio showed a trend to descend while ladino clover and weed ratio had a trend to ascend remarkably. 11. In all plots, the percentage of ladino clover was 5.5∼12.3% till the second cut however,
KISS연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
