论文部分内容阅读
我省自1974年大面积引种湿地松(Pinus ellittii Engelinann)以来,造林面积已超过10万亩,成为主要造林树种之一。1976年以后,不论平原、丘陵、山地的引种点,均不同程度地陆续发生芽流脂病,发病率一般在10—30%,有的高达80%。芽流脂病严重地影响干形和高生长,据在抚州、宜春等地调查,7年生树高不足3m,比同令健树矮一倍以上。据笔者调查研究,此病属生理性病害,以幼树发生为主,每年10—12月为发病高峰期。低洼积水和土壤贫瘠的地段发病严重。病株针叶和梢头含硼量显著低于健株。每株根部施硼10g,防治效果可达95%以上。
Since the introduction of Pinus ellittii Engelinann in large area in 1974, the area of afforestation in our province has exceeded 100,000 mu and has become one of the main afforestation species. After 1976, buds and fats were gradually introduced to various degrees, regardless of plains, hills and mountains. The incidence was generally 10-30% and some as high as 80%. Bud flow disease seriously affect the dry and high growth, according to Fuzhou, Yichun and other places survey, 7-year-old tree less than 3m, more than double the same order to make tree health. According to the author’s investigation and study, the disease is a physiological disease, the main occurrence of saplings, 10-12 months of each year as the peak incidence. Low-lying water and barren soil lots of serious illness. The content of boron in coniferous and shoots of diseased plants was significantly lower than that of healthy plants. Apply boron 10g per plant root, the control effect can reach more than 95%.