亚热带丘陵区多年生黑麦草引种试验(1987～1989年)

AN INTRODUCTION TRAIL OF RYEGRASS IN HILL COUNTRY IN THE SUBTROPICAL REGION(1987～1989)

亚热带高温伏旱丘陵区的钟祥县,夏季水热条件极为严酷,牧草生长停滞,草群枯黄、牲畜青草短缺.经多年生黑麦草引种试验,筛选出了 TT—80和86—49黑麦,具有较强的耐热抗旱能力.在7月份最高温度38.2℃,日气温30℃以上持续24天,降水仅47.6mm 的条件下,仍呈现青绿状态,越夏成活率可达95%,同时具有萌发早、生长快、产量高、质量好的优良性状.

In Zhong Xiang County in the hilly subtropical region heat-water conditionin summer is severely harsh.In such condition,the grass stops growth and tu-rns yellowish,fresh forage is lack for animals.By the introduction of ryegrass,77-88 and 86-49 ryegrass were selected for this region,because they had goodheat and drought resistance.In July,the highest air temperature was 38.2° C,and therewas a 24 days duration of dailly temperature above 30° C and rainfallonly 47.6 mm,but the two ryegrasses still maintained dark green,their over-summering was more than 95%.They also had the characters of sprouting early,growing fast,high forage yield and good quality.