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[油茶苗]不同磷源对酸性红壤养分及油茶幼苗生长的影响

发布时间:2021-01-18来源:全冠香樟树

[Objective] This study aimed to improve phosphorus use efficiency when applied to oil-tea. [Method] The growth of Camellia oleifera 'Xianglin 4' and nutrients content in acidic soils were tested in pot experiment with sparingly soluble and organic phosphates in compared with no exogenous phosphorus applied. [Result] The application of sparingly soluble and organic phosphates had distinct impact on the nutrients levels in acidic soil. Total phosphorus content was accumulated by Fe-P while the content of available phosphorus content was increased by Ca-P and A1-P significantly and the values were 120 times and 125 times in rhizosphere soil as compared with CK. Meanwhile,there were significant differences between contents of rhizosphere and non-rhizosphere soil. The Ca-P and A1-P increased the seedling height, fresh weight of shoot, dried weight of root while decreased root/shoot ratio significantly. The effects were not significant when treated with Fe-P and O-P. The application of sparingly soluble and organic phosphates in- creased the P content of old leaves, tender leaves and roots and affected their N and K contents as well.and growth of oil-tea,of which the most significant effects were obtained by A1-P and Ca-P. A1-P and other sparingly soluble phosphates may be the main source of plant P in unfertilized soil.

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[油茶苗]不同磷源对酸性红壤养分及油茶幼苗生长的影响

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