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我省柑桔90%在丘陵山地,立地条件差,普遍存在土壤瘦、酸、粘、结构差、易受旱害等问题.为发展我省优势,向山索宝,开创柑桔生产新局面,亟需进行山地红壤的改土培肥,以改变上述不利的生态环境.六十年代柑桔上山曾推广挖大穴(或壕沟)、施大肥及幼龄园扩穴改土等技术,但对成年果园的改土研究较少.1977年我们对成年低产和盛产后出现衰退的柑桔树进行了科学改土培肥试验,并作系统的定位鉴测.试验在永春县桃源大队果场进行,以芦柑和蕉柑为对象,结果面积49.7亩,并配合大面积示范.以12年生和15年生芦柑为试验园①和②,在树干1米外挖深坑,分
In our province, 90% of the citrus fruits are in hilly and mountainous areas, with poor site conditions and widespread problems such as leanness, acidity, stickiness, poor structure and drought resistance etc. In order to develop the advantage of our province, In order to change the unfavorable ecological environment, citrus ascending to the mountains in the 1960s promoted the technology of digging large holes (or ditches) In 1977, we conducted scientific soil improvement and fertilization experiments on citrus trees with low yield and high yield after being abused, and systematically investigated the location.And the experiment was carried out in the fruit field of Taoyuan Brigade in Yongchun County , With citrus and banana as the object, the result area of 49.7 acres, and with large-scale demonstration of 12-year-old and 15-year-old citrus as a test garden ① and ②, digging pit 1 meter away from the trunk,