陕西关中地区常见果粮间作树种养分循环研究

Nutrient Cycling of Common Fruit Trees Interplanting with Crops in Shaanxi Guanzhong Region

针对陕西关中地区常见的4种果粮间作形式进行了林木生物量、养分循环量及循环特征研究。结果表明:在4种果粮间作类型中,柿树的年平均生物量最高,并且果实内营养元素存留量低,适合做果粮间作树种;桃树的富集能力和吸收力最强,营养元素需求量大,但速生效果好,适合做短期速生树种。在不同间作类型中,由于树种不同,造成系统中养分循环存在很大差异,应根据实际情况选择适宜树种,进而达到最优配置,创造最优的经济和生态效益。

Four species of fruit tree that are interplanted with grain crops in Guanzhong region, Shaanxi Province, China were used as research objects to study biomass, nutrient cycling and circulation characteristics. The results showed that among four species, the annual average biomass of Diospyros kaki was the highest, the retention level of the nutrients was lower than others, suitable for being interplanted with grain crops. Amygdalus persica exhibited the strongest capability to enrich and absorb nutrients, demanding large amount nutrient elements, suitable to be used as a short-term fast-growing species for its fast growing character. Juglans regia could grow in lean soil. Significant differences were found in nutrient cycling among different fruit trees species, indicating that rational consideration should be taken to select fruit tree species based on actual situations to create the best economic and ecological benefits in developing fruit tree-grain crop interplanting.