五针松针叶发黄的原因五针松在盛夏及初冬季节，枝条中间的部分针叶常会出现不规则发黄，这是五针松进行新陈代谢的正常表现。但是，有些花卉爱好者所莳养的五针松每逢夏天到来，当年生的新叶，叶尖变黄，深秋以后部分叶尖枯死，以后逐渐全叶发黄，失去光泽，就会大大影响... Five needles pine needles yellow causes Five needles in midsummer and early winter, some of the branches in the middle of the leaves often appear irregular yellow, which is the normal performance of five needle pine for metabolism. However, some pine needles raised by some flower lovers come every summer. When the new leaves of the year are born, the leaf tips turn yellow. After the fall, some of the leaf tips are dead and then gradually become yellowed and tarnished in the whole leaf. ...