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1、不同播種方法對水稻秧苗素質(zhì)及其產(chǎn)量的影響 摘要:為探明旱育長齡壯秧的適宜播種方法,提高水稻單產(chǎn),以臨稻16號為材料進行不同播種方法的田間試驗。試驗設(shè)T1(澆底墑水→撒種→一次覆土1.0cm→覆膜)、T2(澆底墑水→撒種→二次覆土3.5cm→出苗前退土保留1.0cm土層)、T3(撒種→一次覆土1.5cm→澆蒙頭水)3個處理,隨機區(qū)組設(shè)計,重復3次,本田試驗對應秧田進行設(shè)計。試驗結(jié)果是:T1的秧苗素質(zhì)最好、產(chǎn)量最高,平均單株分蘗為1.42個,根條數(shù)為44.6條,百株鮮重為259.5g,單產(chǎn)為10459.2kg/hm2;T3的秧苗素質(zhì)和產(chǎn)量次之,平均單株分蘗為0.89個,根條數(shù)為
2、37.2條,百株鮮重為224.8g,單產(chǎn)為9178.7kg/hm2;T2的秧苗素質(zhì)最差、產(chǎn)量最低,平均單株分蘗為0.75個,根條數(shù)為35.5條,百株鮮重為219.1g,單產(chǎn)為8495.2kg/hm2;3個處理之間的產(chǎn)量差異均達極顯著水平。結(jié)論是:“澆底墑水→撒種→一次覆土1.0cm→覆膜”的播種方法,能增溫、保墑、防鳥,提高出苗率,出苗快,苗全苗齊,秧苗素質(zhì)好,移栽后能早生快發(fā),增加單位面積穗數(shù)和穗粒數(shù),提高單產(chǎn)?! £P(guān)鍵詞:水稻;播種方法;秧苗素質(zhì);產(chǎn)量 中圖分類號:S511.042文獻標識號:A文章編號:1001-4942(2016)11-0065-04 Abstra
3、ctInordertoexplorethesuitablesowingmethodforstrong,long-ageanddrynurseryseedlingsofricetoraise9yield,thefieldtrialswereconductedwithLindao16asmaterial.Threetreatmentsweredesigned,includingT1(irrigatingpre-sowingwater→sowingseeds→covering1.0cmofsoilonce→coveringfilm),T2(irrigatingpre-sowingw
4、ater→sowingseeds→covering3.5cmofsoiltwice→retaining1.0cmofsoilbeforeseedlingemerging),T3(sowingseeds→covering1.5cmofsoilonce→irrigatingfully).Randomizedblockdesignwiththreereplicationswasusedaccordingtotheseedbed.TheresultsshowedthattheseedlingqualityofT1treatmentwasthebestanditsyieldwasthe
5、highestwiththeaveragetillernumberperplantof1.42,rootnumberof44.6,freshweightperhundredseedlingsof259.5gandyieldof10459.2kg/hm2.TheseedlingqualityandyieldofT3treatmentwasthesecond,anditsaveragetillernumberperplantwas0.89,therootnumberwas37.2,thefreshweightperhundredseedlingswas224.8gandtheyi
6、eldwas9178.7kg/hm2.TheseedlingqualityofT2treatmentwastheworstanditsyieldwasthelowestwiththeaveragetillernumberperplantof0.75,rootnumberof35.5,freshweightperhundredseedlingsof219.1gandyieldof8495.2kg/hm2.Therewereverysignificantdifferencesamongthreetreatments.Inconclusion,themethodofirrigati
7、ngpre-sowingwater→sowingseeds→covering1.0cmofsoilonce→coveringfilmcouldraisetemperature,keepwater,preventbirds,improve9theemergencerateandtheseedlingswerestrongsothattheycouldgrowearlyandquicklyaftertransplantingthusaddingthenumberofgrainsperspikeandspik