Spatial distribution characteristics of soil phosphorus in a jujube-crop | 枣粮间作生态系统土壤磷的空间分布特性
2009
Yin Fei, Henan University of Science and Technology, Luoyang (China),College of Agronomy | Wang Qun, Henan Agricultural University, Zhengzhou (China), College of Agronomy | Fu Guozhan, Henan University of Science and Technology, Luoyang (China),College of Agronomy
中国人. 基于枣粮间作复合生态系统内部异质性，通过在不同位置采样测定，探讨了枣粮间作系统内土壤磷素空间分布特性．结果表明，枣粮间作生态系统中，在小麦收获期和玉米收获期2个时期，土壤全磷和速效磷含量均存在明显的空间变异性．垂直方向上，0―20cm土层全磷和速效磷含量显著高于下部土层．水平方向上，0-20cm土层全磷空间差异性较大，而0―20cm土层速效磷水平分布特性在不同时期有较大差别．小麦收获期土壤速效磷含量随着距枣树种植行距离的增加呈单峰曲线变化趋势，峰值出现在1m样点处．而玉米收获期速效磷水平方向上空间差异性变小．[著者文摘]
显示更多 [+] 显示较少 [-]英语. Based on the spatial heterogeneity of jujube-crop intercropping ecosystem （JIE）, the spatial distribution of soil total phosphorus （TP） and available phosphorus （AP） were determined by sampling at different sites in this ecosystem. The results showed that there was an obvious spatial variance of soil TP and AP at wheat （ Triticum aestivum L. ） harvesting time and maize （ Zea mays L. ） harvesting time in JIE. The concentrations of soil TP and AP in 0 -20 cm soil layer were significantly higher than those in 20 - 150 cm soil profile. The results also showed that the horizontal variance of soil TP was more obvious in 0 -20 cm soil layer. However, the horizontal distribution characteristics of soil AP in 0 - 20 cm soil layer varied according the sampling time. At wheat harvesting period, when apart from the jujube tree row, the AP concentration of 0 -20 cm soil layer decreased steadily after a sharp increase and the maximum occurred at 1 m sampling site. But at maize harvesting period, the horizontal variance of AP in 0 -20 cm soil layer was inconspicuous.
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