施磷对玉米与蚕豆间作体系养分吸收的影响

Effect of Application of Phosphate Fertilizer on Absorption of Nutrient for Maize and Broad Bean Intercropping System

采用不同的施磷量来检验玉米与蚕豆间作体系中蚕豆和玉米对氮、磷、钾吸收量的动态变化。结果表明:施磷不仅增加了间作蚕豆和玉米地上部磷吸收量,并且在一定程度上增加了单、作间的磷吸收差异。但是,无论是单作还是间作,吸磷量并没有随着施磷量的增加而增加。可以看出:施磷量对单间作蚕豆和玉米氮、磷、钾的吸收量没有很大的影响;玉米间作蚕豆与根瘤菌高效共生体系具有很强的适应能力,在较低肥力水平下,具有明显的资源利用优势。

The dynamic changes of NPK absorption by maize and broad bean in maize and broad bean intercropping system were tested by using different application amount of phosphate fertilizer. The results show that the phosphorus uptake of the above-ground parts of the intercropping maize and broad bean had increased with different application amount of phosphate fertilizer and the differences of phosphorus uptake between different single cropping increased to certain extent with application of phosphate fertilizer. But whatever the intercropping or single cropping the absorption of phosphorus had not increased with the increase of application amount of phosphate fertilizer. It is concluded that different application amount of phosphate fertilizer has no effect on NPK absorption of single cropping and intercropping maize and broad bean. The high-efficient symbiosis system of maize/ broad bean and rhizobium has a strong adaptation capacity and has an obvious advantages in resources utilization under a relatively low Fertility level.