摘要
板栗是一种重要的经济树种和优良林木。国际市场对板栗需求量很大。欧、美、日本及东南亚各国均需进口板栗。仅日本每年市场容量约100000t。而我国每年仅出口20000t,国内的需求量也很大。目前,我国人均占有量仅0.055 kg,与日本人均占有量0.55kg(不包括进口)相差甚远。我省板栗栽培历史悠久。现有板栗6万余亩。分布在30多个市县,常年产量约2000t,主要分布在宜溧山区,年产超过1100t。次为沂沭河冲积平原地区的新沂、沭阳及邳县。此外,连云港、苏州洞庭山及宁镇等地也有产出。
Chestnut is kind of hard fruit contained some necessary elements for human body,which is being considered as one of an important farm products earned foreign currency for China and has great demand both at home and abroad. Although chestnut-growing in China has very long history dating back to Tang dynasty, yet both the quality and output of Chinese chestnut need to improve. As viewed from geoagriculture,the paper mainly analyses the geological setting,soil geo- chemistry properties and their related factors to the plantation of Chinese chestnut with comparison to other chestnut-growing areas in China.Here,author suggests that Chinses chestnut is fitted to grow in weathered and denuded soils of medium-acid felsic rocks from three rock series of sedimentary,igneous and metamorphic rocks.A great mass of evidence has proved that the pH value of soils is an important controlling factor to the grow of Chinese chestnut.
出处
《江苏地质》
1990年第1期57-60,共4页
Jiangsu Geology
