山茶花的叶子发黄：
1、新陈代谢
shanchahuashichanglvqiaomu，yepianzixinshaoxingchenghou2—3nianbutuoluo，danzai4yi5yuehuanyeqiwen，shaolianglaoyeyehuibianhuangtuoluo，zheishishanchashuxinchendaixiedezhengchangxianxiang。
2、土壤不适
xiajizhizhufashengyezihuanghuahuobaihuashiyinweituranghuoquelin、huoquetie、huoqueliudengyingyangyuansu。keyidiaohuanpentu，yongfuzhizhifengfudeshannizaipei。4—9yuefen，meige15tianyongxishi300beideliusuanyatiejinye，huoyongsanliulinrongyepenshiyemian，kejianqingbingzhuang。penyaoyingxuanzeyintianjinxing，qingtianyingzaiqingchenhuobangwanjinxing。
3、元素不足
zaishanchahuashengzhangguochengzhong，ruguodanyuansugongyingbuzuyehuichuxianyezifahuangxianxiang。keshiyifushudoubingshui，meiyueyici，feishuidebiliwei20%yi30%。ruozaijiaru1%liusuanyatierongyeyufeiyezhong，xiaoguogenghao。
4、浇水不当
shanchahuayanghuxuyaozhuyijiaoshui，ruguojiaoshuibudang，chixuganhanhuoguoshi，yehuiyinqihuangye。pentuguoshi，zhizhugenxihuibianheifulan，yinqiyezifahuangtuoluo。zaigaowenqingtian，zhizhusuiyoulianzizheyin，pentujingchangganzaoyehuiyinqiyezifahuangtuoluo。
5、虫害危害
shanchahuahuifashenggezhongchonghaibinghai，yuyouhongzhizhuhuojieqiaochongweihaizhizhu，yihuidaozhiyezikuhuang。hongzhizhukeyong25%yaoyejiashui1000—1500beiye，huo50%sanliulinjiashui2500-3000beiyepensha;jieqiaochongkeyong5%yaoyeshuirongyepensha。
shanchahuadeyezifahuangshihenchangjiandeyigexianxiang，huoxushizhengchangdexinchendaixie，yeyoukenengshiyanghubudanghuochongbinghaiweihai，zheixuyaowomenqujutifenxilejielaicaiquyingduidecuoshi，shanchahuadeyezifahuangdechangjianyuanyinxiaobianjidajiazhenglidaozheilile，xiwangduidajiayousuobangzhu。
