寒害与季节变化对油棕叶片大中量营养元素含量及其变化规律的影响

摘要

In this paper,the effects of cold injuries and seasonal variations on the nutritional elements of oil palm leaves were studied.The results showed that the content of nitrogen in oil palm leaf decreased during the cold injury and increased slowly afterwards; the content of phosphorus decreased obviously under cold injury and presented ‘W' curves during seasonal variations; the content of potassium declined during seasonal variations,however,the content of calcium significantly increased and presented ‘M' curv es under cold injury.The content of sodium of oil palm leaves decreased in seasonal variation but increased during the cold injuries.It indicated that the nutritional elements of oil palm were fluctuated with seasonal variations,which would provide some fertilizer guides and cold tolerance theories for oil palm.%本文探索了寒害对油棕叶片大中量营养元素含量及其变化规律的影响.结果表明:油棕叶片N含量在寒害期间整体呈现降低趋势,而后缓慢升高；P含量在寒害期间明显下降,在整个周年的季节变化中呈现规则的“W”变化曲线；K含量在周年变化中,呈现下降趋势；Ca含量在寒害期间呈明显增高的趋势,呈现规则的“M”变化曲线；油棕叶片Na含量在周年季节变化中,呈现出明显的下降趋势,寒害期间油棕叶片Na元素含量仍呈增高的趋势.这表明油棕叶片营养元素含量在生长季节的波动情况,因季节不同而异.此结果将为油棕施肥和耐寒性提供理论指导.