槟榔不同混交模式对叶片养分吸收及土壤养分的影响

Effects of Leaf Nutrient Absorption and Soil Nutrient in Ddifferent Mixed Patterns of Arecanut

为探究槟榔不同混交模式对叶片养分吸收及土壤养分的影响,田间设置槟榔×菠萝蜜、槟榔×面包果、菠萝蜜、面包果、槟榔5种种植模式。结果表明:槟榔×菠萝蜜混交能在一定程度上增加土壤pH值、有效磷和速效钾含量,对土壤养分的提升效果较槟榔×面包果混交模式更显著。槟榔×菠萝蜜对菠萝蜜叶片养分含量无显著影响,对槟榔叶片全氮、全磷、全钾含量也无显著影响。而槟榔×面包果显著降低了面包果叶片对磷素的吸收,也降低了槟榔叶片对氮、磷、钾、镁素的吸收,但增加了对钙素的吸收。土壤pH值与土壤有效磷含量呈显著正相关,土壤有机质与土壤碱解氮和有效磷含量呈显著正相关,与土壤速效钾呈极显著负相关关系,土壤有效磷含量与叶片全钾含量呈极显著负相关关系。综合分析认为,槟榔×菠萝蜜对提高土壤养分的综合效果较槟榔×面包果更佳。

In order to investigate effects of leaf nutrient absorption and soil nutrient in different mixing patterns of arecanut,the field experiments in the study were designed to have five cropping patterns,arecanut×jackfruit,arecanut×breadfruit,jackfruit,breadfruit,arecanut.The results showed that arecanut mixed with jackfruit could increase the soil pH,available phosphorus and available potassium content,and the improving effect on soil nutrients was more significant than the patterns of arecanut mixed with breadfruit.Arecanut mixed with jackfruit had no significant effect on the nutrient content of jackfruit leaves and the contents of total nitrogen,phosphorus and potassium in arecanut leaves.While arecanut mixed with breadfruit significantly decreased the absorption of phosphorus in breadfruit and nitrogen,phosphorus,potassium and magnesium in arecanut as well as increased the absorption of calcium in arecanut leaves.There was a significantly positive correlation between soil pH value and soil available phosphorus content.Soil organic matter and soil alkalyzable nitrogen were significantly and positively related to available phosphorus content,and significantly and negatively related to soil available potassium content.There was a significantly negative correlation between soil available phosphorus content and total potassium content in leaves.All the results suggested that the comprehensive effect of arecanut mixed with jackfruit on improving soil nutrients is better than the patterns of arecanut mixed with breadfruit.