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中航江苏农业发展集团有限(xian)公(gong)司

春季育苗管理技术措施 种子优选与消毒 温湿度调控 合理光照

培(pei)育壮苗(miao)(miao)是蔬(shu)(shu)菜(cai)丰(feng)产的基础,注意做(zuo)好以(yi)下工作: (一(yi))种(zhong)(zhong)(zhong)(zhong)子(zi)优(you)选与消(xiao)(xiao)毒(du)(du)。要(yao)(yao)选用优(you)良(liang)适(shi)(shi)用品种(zhong)(zhong)(zhong)(zhong),从正规途径购买(mai)种(zhong)(zhong)(zhong)(zhong)子(zi),确(que)保(bao)种(zhong)(zhong)(zhong)(zhong)子(zi)质(zhi)量。播前进(jin)行(xing)种(zhong)(zhong)(zhong)(zhong)子(zi)消(xiao)(xiao)毒(du)(du),以(yi)防止和减轻病虫害(hai)的发生。消(xiao)(xiao)毒(du)(du)方法有温(wen)(wen)(wen)汤烫(tang)种(zhong)(zhong)(zhong)(zhong)、药剂浸种(zhong)(zhong)(zhong)(zhong)及干热消(xiao)(xiao)毒(du)(du)等(deng)。 (二)温(wen)(wen)(wen)湿度(du)(du)(du)(du)调控(kong)。出(chu)(chu)苗(miao)(miao)前要(yao)(yao)保(bao)持较高(gao)温(wen)(wen)(wen)湿度(du)(du)(du)(du)(一(yi)般耐低(di)温(wen)(wen)(wen)蔬(shu)(shu)菜(cai)22℃左(zuo)右(you),喜温(wen)(wen)(wen)蔬(shu)(shu)菜(cai)30℃左(zuo)右(you))促进(jin)出(chu)(chu)苗(miao)(miao),出(chu)(chu)苗(miao)(miao)后应(ying)控(kong)水(shui)(shui)控(kong)温(wen)(wen)(wen)。温(wen)(wen)(wen)度(du)(du)(du)(du)过(guo)高(gao),易造成苗(miao)(miao)期徒长,引起(qi)甘蓝等(deng)叶(ye)类蔬(shu)(shu)菜(cai)抽苔(tai),此时(shi)应(ying)适(shi)(shi)时(shi)通(tong)风降温(wen)(wen)(wen)除(chu)湿,要(yao)(yao)避免(mian)苗(miao)(miao)床高(gao)湿,防止烤苗(miao)(miao)、沤根、猝倒等(deng)苗(miao)(miao)期病害(hai)发生。温(wen)(wen)(wen)度(du)(du)(du)(du)过(guo)低(di),则(ze)易影响苗(miao)(miao)期生长发育进(jin)程(cheng),甚至形(xing)成僵苗(miao)(miao)。温(wen)(wen)(wen)度(du)(du)(du)(du)过(guo)高(gao),此时(shi)则(ze)应(ying)及时(shi)采取加(jia)温(wen)(wen)(wen)措施,夜间(jian)应(ying)覆(fu)盖(gai)草苫、保(bao)温(wen)(wen)(wen)被等(deng)保(bao)温(wen)(wen)(wen)。 (三(san))合理光(guang)照。连阴天(tian)或(huo)雨(yu)天(tian)应(ying)晚(wan)揭(jie)早盖(gai)草帘、保(bao)温(wen)(wen)(wen)被等(deng)覆(fu)盖(gai)物(wu),使(shi)秧(yang)苗(miao)(miao)多(duo)接受散射光(guang),还可采取人工补光(guang)措施。连阴骤(zhou)晴或(huo)雨(yu)后骤(zhou)晴,则(ze)应(ying)间(jian)隔揭(jie)开外保(bao)温(wen)(wen)(wen)覆(fu)盖(gai)物(wu),使(shi)秧(yang)苗(miao)(miao)逐步(bu)适(shi)(shi)应(ying)强光(guang),避免(mian)植株(zhu)(zhu)萎(wei)蔫。萎(wei)蔫症状出(chu)(chu)现时(shi),可在植株(zhu)(zhu)上喷(pen)水(shui)(shui)或(huo)叶(ye)面肥。 (四)低(di)温(wen)(wen)(wen)炼(lian)苗(miao)(miao)。定植前7-10 天(tian)左(zuo)右(you),应(ying)加(jia)强通(tong)风降温(wen)(wen)(wen),控(kong)制(zhi)浇水(shui)(shui),逐步(bu)撤除(chu)覆(fu)盖(gai)物(wu)以(yi)进(jin)行(xing)低(di)温(wen)(wen)(wen)炼(lian)苗(miao)(miao),提(ti)高(gao)幼苗(miao)(miao)对外界环境(jing)的适(shi)(shi)应(ying)能力。炼(lian)苗(miao)(miao)切勿(wu)过(guo)度(du)(du)(du)(du),以(yi)免(mian)引起(qi)僵苗(miao)(miao)。

文章分类: 农业技术
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