论文部分内容阅读
湖南省柑桔树种植面积不少,但产量一直偏低。除了部分地区是因选种或栽培管理不善外,其余大部分是受气候变化的影响所致。据统计,解放后,湖南省的柑桔树分别在1954年、1969年、1976年受到了三次较严重的冻害。个别地区短时间的气温在-15℃左右。1976年受冻害的面积之广、灾情之重,是空前的。几乎使全省的几个主要柑桔产地的黔阳、邵阳、盖阳等地区的产量下降90%以上。因此,在发展柑桔生产中,如何加强防寒防冻的科学研究工作,是个重要课题。我们认为,根据目前我国的具体情况,采取向树上及地面喷洒抑蒸保温剂和在寒流及霜冻侵袭之前2—3小时用人工熏烟这样两种方法较为便利,且在经济和人力上比较节约,是大面积柑桔树防寒防冻的一条较好的途径。现将两种方法介绍一下。
Hunan Province, citrus trees planted a lot, but production has been low. Most of the rest is due to the impact of climate change, except in some areas due to poor selection of cultivation or cultivation. According to statistics, after the liberation, citrus trees in Hunan Province suffered three more serious frost damage in 1954, 1969 and 1976, respectively. In some areas short-term temperature of -15 ℃ or so. The area harmed by the freeze in 1976 was so great that the disaster was unprecedented. Almost so many of the province’s main citrus origin Guizhou, Shaoyang, Gaiyang and other areas output fell by more than 90%. Therefore, in the development of citrus production, how to strengthen the scientific research of cold and frost is an important issue. In our opinion, according to the current situation in our country, it is more convenient and economical to compare the two methods of spraying heat-suppressing and heat-preserving agents on trees and the ground and artificial smoking fluently 2-3 hours before the cold current and frost attack Saving, is a large area of citrus trees, a good way of antifreeze. Now introduce the two methods.