施肥对幼林落叶松养分含量及光合特性的影响

摘要

This paper analyzed the N content of leaf and root, photosynthetic characteristics, and chlorophyll content after the different fertilization conditions.The results showed that the N elements transfer speed was accelerated from the root to the leaf when a small amount of fertilizer was applied, and the promoting effect was the largest for the photosynthetic and respiratory efficiency.But with the increase of the amount of fertilizer, the promoting effect was reduced.The suitable fertilization for the young growth of L.gmelinii was applied fertilizer 1.3 kg per 100 square meter.%本文对不同施肥处理条件下,落叶松叶片及根系含N量及光合特性、叶绿素含量进行测定分析,结果表明:少量施入肥料时,N元素从根部向叶片转移的速度加快,对植株光合和呼吸效率的促进作用最大.但随着施肥量的增加,促进作用降低;施肥量1.30kg/100m2是较为适合落叶松幼林的施肥方案.