1.枯梢:zaochungangkaishishengchangshi,huifashengkushao。daoxiamo,xinshaoshangdeyezichengzongse,eryebingchenghongse,zhenggeyepianchengtuqihuoniuquzhuang。zaiyedejianduanjibianyuanchuchuxianhuaisiquyu。dianxingzhengzhuangshizhitiaodingduanderenpibujixingchengcengzhongchengxianxixiaodehuaisiquyu,zhezhongleixingdehuaisi,changjianyuyeyexiamiandezuzhi,zaikuodajiushixinshaocongdingduanwangxiafashengkusi。
2.掃帚枝:春chun季ji,看kan起qi來lai正zheng常chang的de芽ya停ting止zhi生sheng長chang或huo生sheng長chang得de很hen慢man,不bu久jiu即ji死si亡wang。受shou害hai枝zhi從cong頂ding端duan到dao幾ji年nian的de木mu質zhi部bu都dou會hui逐zhu漸jian死si亡wang,緊jin靠kao著zhe死si亡wang部bu分fen,下xia麵mian側ce芽ya長chang出chu許xu多duo不bu正zheng常chang的de細xi枝zhi,這zhe些xie小xiao枝zhi又you迅xun速su死si亡wang,刺ci激ji著zhe其qi他ta萌meng發fa枝zhi的de發fa育yu,以yi致zhi形xing成cheng掃sao帚zhou狀zhuang。這zhe種zhong類lei型xing的de缺que硼peng,可ke在zai幾ji年nian之zhi內nei使shi整zheng株zhu死si亡wang。
3.簇葉:在早春或夏末發生枯梢以後,從不正常的短節上長出非常細小、較厚和易脆的葉片,它們多半發育不全,葉緣平滑無鋸齒。
4.落果:果guo實shi發fa育yu初chu期qi還hai可ke形xing成cheng木mu栓shuan層ceng,漸jian漸jian地di在zai幼you果guo皮pi上shang出chu現xian水shui浸jin狀zhuang壞huai死si區qu域yu,壞huai死si區qu域yu逐zhu漸jian變bian硬ying,呈cheng褐he色se,以yi後hou,由you於yu果guo實shi的de生sheng長chang使shi果guo皮pi發fa生sheng裂lie縫feng及ji皺zhou縮suo,並bing形xing成cheng薄bo層ceng粉fen霜shuang,果guo實shi早zao期qi脫tuo落luo,或huo者zhe仍reng掛gua在zai枝zhi上shang。
5.苦果:缺硼的果實,可在落花後兩周到采前任一時間內,在果肉內形成“內木栓層”。最初在果肉內顯出水浸狀區域,以後,很快變成褐色潰瘍,幹後形成木栓。如病症早期發生,受害果畸形、早落;若晚期發生,則果實不畸形,但果肉內有較大褐色潰瘍。成熟果的褐色潰瘍部分有苦味。
由(you)於(yu)硼(peng)具(ju)有(you)在(zai)樹(shu)體(ti)內(nei)不(bu)能(neng)積(ji)累(lei)又(you)不(bu)能(neng)轉(zhuan)移(yi)的(de)性(xing)質(zhi),決(jue)定(ding)了(le)在(zai)蘋(ping)果(guo)樹(shu)整(zheng)個(ge)生(sheng)長(chang)周(zhou)期(qi)內(nei)需(xu)源(yuan)源(yuan)不(bu)斷(duan)地(di)供(gong)給(gei)硼(peng),這(zhe)也(ye)是(shi)為(wei)什(shen)麼(me)在(zai)極(ji)度(du)缺(que)硼(peng)的(de)地(di)區(qu),土(tu)壤(rang)施(shi)硼(peng)比(bi)噴(pen)硼(peng)更(geng)為(wei)有(you)效(xiao)的(de)道(dao)理(li)。由(you)於(yu)這(zhe)一(yi)性(xing)質(zhi),蘋(ping)果(guo)樹(shu)會(hui)隨(sui)時(shi)發(fa)生(sheng)缺(que)硼(peng)症(zheng)狀(zhuang)。另(ling)外(wai),因(yin)為(wei)硼(peng)的(de)有(you)效(xiao)性(xing)受(shou)多(duo)種(zhong)因(yin)素(su)影(ying)響(xiang),因(yin)此(ci),每(mei)年(nian)在(zai)同(tong)一(yi)地(di)塊(kuai)的(de)樹(shu)體(ti),也(ye)會(hui)發(fa)生(sheng)不(bu)同(tong)的(de)症(zheng)狀(zhuang)。
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