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金衢地区为我省主要的低丘红壤开发区。近年来,随着农村商品经济的发展,农民开始在低丘红壤上大量种植柑桔。该地区土地资源潜力很大,但也存在某些不利因素,尤其是夏、秋季节的高温干旱,土壤瘠薄,灌溉条件差甚至无灌溉条件等等。因此,采取针对性农业措施,提高红壤肥力和持水性能,改善柑桔园的生态环境,提高柑桔自身的抗逆性,对发展该地区柑桔生产有着重要意义。为此,我们于1982年开始,在浙江省兰溪红壤试验场(现改为兰溪市茶场)针对本地区特点,进行长期定位试验,研究幼龄桔园采用生物覆盖措施,对低丘红壤桔园的土壤肥力、夏秋季节的土壤水热状况以及柑桔生长和产量的影响。现将研究的初步结果报道如下。
Jinqu area is the main hilly red soil development zone in our province. In recent years, with the development of rural commodity economy, peasants began to mass-produce citrus in the red soil of low hills. There is great potential for land resources in this area, but there are also some unfavorable factors, especially hot and dry conditions in summer and autumn, poor soil conditions, poor irrigation conditions, and even non-irrigation conditions. Therefore, it is of great significance to take targeted agricultural measures to improve the fertility and water holding capacity of red soils, improve the ecological environment of citrus orchards and improve the resistance of citrus, which is of great significance for the development of citrus production in the region. For this reason, we started long-term experiment on the characteristics of this area in Lanxi red soil test site (now changed to Lanxi tea plantation) in 1982 to study the application of biological coverage in juvenile orange orchard, Soil fertility, soil water and heat conditions in summer and autumn as well as citrus growth and yield. The preliminary results of the study are reported below.