초록
북방형(北方型) 목초(牧草)의 하고성(夏枯性) 방제(防除)하기 위하여 1976년(年) 7월(月)1일(日)부터 8(월)月14일(日)까지 Orchard grass, Tall fescue, Red clover, Alfalfa, Crabgrass의 5초종(草種)에 보리짚을 $100g/m^2$, $200g/m^2$, $300g/m^2$ 피복(被覆)하고 목초(牧草)의 성장(成長), 수량(收量) 및 영양성분(營養成分)에 미치는 영향(影響)을 검토(檢討)한 결과(結果) 다음과 같은 결론(結論)을 얻었다. 보리짚 피복(被覆)에 의하여 피복구(被覆區) 지온(地溫)은 무처리구(無處理區)에 비(比)하여 $1.0{\sim}3.04^{\circ}C$의 강하현상(降下現象)을 나타내었다. 피복처리구(被覆處理區)는 무처리구(無處理區)에 비(比)하여 6.0~45%의 성장효과(成長效果)를 나타내었다. $100g/m^2$ 피복구(被覆區)는 무처리구(無處理區)에 비하여 32.77%의 증수효과(增收效果)를 나타내었고 $300g/m^2$구(區) 이상은 부식(腐蝕)에 의하여 7.75%의 감수현상(減收現象)을 표현(表現)하였다. 피복처리구(被覆處理區)에서 생산된 목초(牧草)는 무처리구(無處理區)에 비하여 조단백질(粗蛋白質) 및 가용무질소물(可溶無窒素物)의 증가(增加)를 가져왔고 조지방(粗脂肪), 조섬유(粗纖維) 및 조회분(粗灰分)은 감소현상(減少現象)을 나타내었다.
This experiment was conducted for the control of summer depression of cool-season pasture plant. Orchard grass, tall fescue, red clover, alfalfa, and crabgrass were mulched by barley straw with depths of $100g/m^2$, $200g/m^2$ and $300g/m^2$ for 45 days -from July 1, to August 14-, and the effects on growth, yield and chemical composition were observed. The results obetain were as follow: Temperature decrease of $1.0{\sim}3.04^{\circ}C$ was followed after barley straw mulching on the grassland as compared with the control. The growth of the grasses after mulching was hastened, i. e. plant height was increasd 6.0~45% as compared with the control. Barley straw mulching with $100g/m^2$ supported the increase in yield of the grasses with an average of 32.77%, however, average yield was decreased by 7.75% with $300g/m^2$ mulching, apparently due to the rottening of grasses. Chemical compositions of mulched grasses were varied; contents of crude protein and nitrogen free extract were higher, but crude fats, fibre, and ashes were lower than those of the control.