shifeishichanshengdefeihainanyishibie，qieyoushihenongyaoyaohaiyouyixiehunxiao。yinci，qubiebutongqingkuang
，shibiechangjianfeihaihenyoubiyao，xiamianjiujieshaoliangleifeihaileixingheshibiefangfa。

燒傷型肥害。果園裏施用化肥，如果采用幹施法，單一施用尿素、碳銨、硫酸銨，且不對水稀釋後施用
，柑橘等果樹極易出現燒傷型肥害。結果往往造成橘樹的主枝、cezhiyanzhonglanpi
，shupishilvbianchenghese，xixiaozhitiaoshishuishenzhikusi。youdejushucongjizhidechengshuyejiankaishishishuibianbaihuohuanghuakujiao，suihouxunsutuoluo
，danzhitiaodingbuxinyekujiaozaishushangbuluoxia，youdeguonongwurenweishigenfubingweihaiyinqilangensishu。yinci
，ganjudengguoyuanshifeiyingzhuyishiyongfuhefeiyuguolinsuangaideng，zehenshaofashengshangshuqingkuang，shidanzhihuafeishi，yingwaxueduishuijiaoshi
，ruguozaiganzaotianqixia，pingshihuafei
，tebieshiwaxueganshishi，shifeihoujiuqingyuyu，feihailaidegengkuai

、更嚴重。

毒du害hai型xing肥fei害hai。有you些xie化hua肥fei是shi具ju有you毒du性xing的de，如ru石shi灰hui氮dan，又you叫jiao氰qing氨an化hua鈣gai，是shi一yi種zhong深shen灰hui色se粉fen狀zhuang或huo細xi粒li狀zhuang的de氮dan肥fei
，也ye是shi唯wei一yi具ju有you非fei水shui溶rong性xing特te征zheng的de遲chi效xiao性xing氮dan肥fei，除chu用yong作zuo肥fei料liao外wai，還hai可ke用yong作zuo除chu草cao劑ji、殺菌劑、脫(tuo)葉(ye)劑(ji)及(ji)殺(sha)滅(mie)釘(ding)螺(luo)等(deng)。但(dan)石(shi)灰(hui)氮(dan)有(you)較(jiao)強(qiang)的(de)毒(du)性(xing)

，施(shi)入(ru)土(tu)壤(rang)後(hou)，需(xu)通(tong)過(guo)一(yi)係(xi)列(lie)的(de)轉(zhuan)化(hua)才(cai)能(neng)被(bei)作(zuo)物(wu)吸(xi)收(shou)，但(dan)在(zai)轉(zhuan)化(hua)過(guo)程(cheng)中(zhong)會(hui)產(chan)生(sheng)一(yi)些(xie)有(you)毒(du)物(wu)質(zhi)毒(du)害(hai)作(zuo)物(wu)
，使(shi)其(qi)受(shou)害(hai)或(huo)死(si)亡(wang)。因(yin)此(ci)在(zai)使(shi)用(yong)時(shi)宜(yi)作(zuo)基(ji)肥(fei)，不(bu)宜(yi)作(zuo)追(zhui)肥(fei)或(huo)種(zhong)肥(fei)，並(bing)嚴(yan)格(ge)控(kong)製(zhi)施(shi)用(yong)量(liang)。對(dui)其(qi)敏(min)感(gan)的(de)作(zuo)物(wu)有(you)油(you)菜(cai)
、馬鈴薯等
，一般不宜施用。

另ling外wai
，劣lie質zhi化hua肥fei中zhong如ru過guo磷lin酸suan鈣gai及ji其qi含han過guo磷lin酸suan鈣gai的de複fu合he肥fei，遊you離li酸suan超chao標biao，施shi入ru土tu壤rang後hou容rong易yi灼zhuo傷shang幼you苗miao。新xin鮮xian的de廄jiu肥fei直zhi接jie施shi用yong
，且qie用yong量liang又you大da時shi

，肥fei料liao在zai分fen解jie過guo程cheng中zhong產chan生sheng大da量liang有you機ji酸suan和he熱re量liang，易yi使shi作zuo物wu根gen部bu受shou傷shang，而er形xing成cheng肥fei害hai。