草莓異常果是指發育不正常的果實,如種子凸起果、聚合果、青頂果、畸(ji)形(xing)果(guo)等(deng)。異(yi)常(chang)果(guo)的(de)出(chu)現(xian),嚴(yan)重(zhong)影(ying)響(xiang)草(cao)莓(mei)果(guo)實(shi)的(de)品(pin)質(zhi),降(jiang)低(di)草(cao)莓(mei)的(de)市(shi)場(chang)價(jia)格(ge),減(jian)少(shao)果(guo)農(nong)的(de)經(jing)濟(ji)收(shou)益(yi)。因(yin)此(ci),生(sheng)產(chan)上(shang)要(yao)采(cai)取(qu)相(xiang)應(ying)的(de)栽(zai)培(pei)管(guan)理(li)措(cuo)施(shi),來(lai)防(fang)止(zhi)異(yi)常(chang)果(guo)的(de)發(fa)生(sheng)。
1.種子凸起果。即草莓種子凸出果麵的果實。這樣的果實外觀品質差,口感酸澀,硬度大。土壤幹旱、植株生長勢差、果(guo)實(shi)附(fu)近(jin)溫(wen)度(du)較(jiao)高(gao)等(deng)都(dou)易(yi)引(yin)起(qi)草(cao)莓(mei)果(guo)實(shi)種(zhong)子(zi)凸(tu)起(qi)。采(cai)用(yong)東(dong)西(xi)向(xiang)起(qi)壟(long)的(de)溫(wen)室(shi),發(fa)生(sheng)種(zhong)子(zi)凸(tu)起(qi)果(guo)的(de)現(xian)象(xiang)較(jiao)多(duo)。因(yin)為(wei)東(dong)西(xi)向(xiang)起(qi)壟(long)時(shi),南(nan)側(ce)的(de)果(guo)實(shi)向(xiang)陽(yang),遮(zhe)擋(dang)少(shao),溫(wen)度(du)較(jiao)高(gao),容(rong)易(yi)形(xing)成(cheng)凸(tu)起(qi)果(guo);北bei側ce朝chao陰yin,遮zhe擋dang多duo,溫wen度du低di,發fa生sheng的de凸tu起qi果guo較jiao少shao。所suo以yi在zai栽zai培pei模mo式shi上shang盡jin量liang采cai用yong南nan北bei向xiang起qi壟long的de方fang法fa,使shi各ge處chu草cao莓mei的de果guo實shi接jie受shou光guang照zhao一yi致zhi,溫wen度du較jiao為wei均jun衡heng,凸tu起qi果guo的de數shu量liang就jiu會hui較jiao少shao。同tong時shi控kong製zhi室shi內nei溫wen度du及ji土tu壤rang含han水shui量liang,創chuang造zao適shi宜yi草cao莓mei生sheng長chang的de環huan境jing條tiao件jian。
2.聚ju合he果guo。即ji雞ji冠guan狀zhuang果guo實shi。聚ju合he果guo的de發fa生sheng,容rong易yi使shi草cao莓mei植zhi株zhu的de負fu擔dan不bu均jun勻yun,增zeng加jia小xiao果guo的de比bi例li,相xiang應ying降jiang低di草cao莓mei果guo實shi的de整zheng體ti品pin質zhi。在zai草cao莓mei花hua芽ya分fen化hua過guo程cheng中zhong(10月上中旬),日照時間短,生長過旺,是形成聚合果的主要原因。因此在栽培管理上,首先要避免花芽分化期過量施用氮素肥料,防止植株旺長;其次要在花芽分化時期,盡量使草莓植株多接受光照,積累營養物質,防止聚合果的發生。
3.青qing頂ding果guo。青qing頂ding果guo是shi下xia部bu成cheng熟shu變bian紅hong,而er上shang部bu尖jian端duan未wei熟shu,仍reng然ran發fa青qing的de草cao莓mei果guo實shi。青qing頂ding果guo的de發fa生sheng,降jiang低di果guo實shi品pin質zhi,推tui遲chi采cai摘zhai期qi,影ying響xiang上shang市shi。草cao莓mei植zhi株zhu出chu現xian旺wang長chang趨qu勢shi,枝zhi葉ye繁fan密mi,再zai遇yu持chi續xu陰yin天tian,光guang照zhao不bu足zu,容rong易yi發fa生sheng青qing頂ding果guo的de現xian象xiang。因yin此ci,在zai管guan理li上shang要yao防fang止zhi草cao莓mei植zhi株zhu旺wang長chang,及ji時shi摘zhai除chu老lao化hua枝zhi葉ye,促cu使shi通tong風feng透tou光guang,同tong時shi在zai保bao持chi溫wen室shi內nei溫wen度du的de情qing況kuang下xia,盡jin量liang早zao揭jie晚wan蓋gai草cao苫shan,延yan長chang光guang照zhao時shi間jian,防fang止zhi青qing頂ding果guo的de發fa生sheng。
4.畸形果。即形狀不正常的果實。畸形果的發生在溫室栽培中是很普遍的現象,也是影響溫室草莓品質和產量的主要原因之一。
畸形果的發生原因主要是因草莓花朵授粉受精不完全而形成的。溫室栽培條件下,缺少傳粉媒介和良好的通風條件,影響花粉的傳播;溫室內空氣濕度大,溫度不均衡,忽高忽低,影響授粉受精;zaikaihuaqijianpenshinongyao,yeyingxianghuafendefaya。zaiyishangjizhongyuanyindezonghezuoyongxia,guomianshangdeyibufenhuashoujingxingchengzhongzi,yibufenweishoujing,meiyouxingchengzhongzi,zhishiguoshishangdezhongzibunengjunyundixingcheng,guoshifayubujunyun,xingchengjixingguo。
防止措施主要有:選擇花粉發芽力強的品種。注意溫室內溫、濕(shi)度(du)的(de)管(guan)理(li),白(bai)天(tian)溫(wen)度(du)高(gao)時(shi),及(ji)時(shi)通(tong)風(feng)換(huan)氣(qi),降(jiang)低(di)溫(wen)濕(shi)度(du),晚(wan)上(shang)加(jia)蓋(gai)保(bao)溫(wen)材(cai)料(liao)或(huo)采(cai)取(qu)保(bao)溫(wen)措(cuo)施(shi),防(fang)止(zhi)室(shi)內(nei)溫(wen)度(du)過(guo)低(di)。花(hua)期(qi)減(jian)少(shao)用(yong)藥(yao)或(huo)盡(jin)量(liang)不(bu)用(yong)藥(yao),利(li)於(yu)草(cao)莓(mei)的(de)授(shou)粉(fen)受(shou)精(jing)。采(cai)用(yong)蜜(mi)蜂(feng)輔(fu)助(zhu)授(shou)粉(fen)。草(cao)莓(mei)開(kai)花(hua)期(qi)間(jian)釋(shi)放(fang)蜜(mi)蜂(feng),通(tong)過(guo)蜜(mi)蜂(feng)來(lai)為(wei)草(cao)莓(mei)授(shou)粉(fen),可(ke)以(yi)明(ming)顯(xian)減(jian)少(shao)畸(ji)形(xing)果(guo)的(de)發(fa)生(sheng)率(lv),提(ti)高(gao)坐(zuo)果(guo)量(liang),增(zeng)加(jia)產(chan)量(liang),提(ti)高(gao)品(pin)質(zhi)。
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