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《四川丘區(qū)播期及密度及施肥量對(duì)直播雙低油菜產(chǎn)量及主要農(nóng)藝性狀影響》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在教育資源-天天文庫(kù)。
1、四川丘區(qū)播期及密度及施肥量對(duì)直播雙低油菜產(chǎn)量及主要農(nóng)藝性狀影響 摘要采用三元二次通用旋轉(zhuǎn)組合設(shè)計(jì)研究了影響直播雙低油菜產(chǎn)量的農(nóng)藝措施，建立了雙低油菜國(guó)豪油8號(hào)在四川丘區(qū)直播種植的高產(chǎn)栽培數(shù)學(xué)模型，并對(duì)8個(gè)重要農(nóng)藝性狀與小區(qū)產(chǎn)量之間進(jìn)行通徑分析。結(jié)果表明：在四川丘區(qū)，直播播期、密度和施肥量對(duì)國(guó)豪油8號(hào)產(chǎn)量均有顯著影響，在本試驗(yàn)條件下，該品種直播栽培獲得產(chǎn)量>2799kg/hm2的農(nóng)藝方案為：9月25―30日播種，密度45.0萬(wàn)～52.5萬(wàn)株/hm2，施肥量0～750kg/hm2。農(nóng)藝措施增產(chǎn)效應(yīng)順序?yàn)椴テ?密度>播期與施肥量>施肥量。直播油菜株高、有效分枝高度、主花序有
2、效段長(zhǎng)、一次有效分枝、二次有效分枝、單株有效角果數(shù)、千粒重和根莖粗對(duì)油菜產(chǎn)量的直接影響為單株有效角果數(shù)>主花序有效段長(zhǎng)>二次有效分枝數(shù)>有效分枝高度>千粒重>株高>根莖粗>一次有效分枝數(shù)。直播油菜的二次有效分枝、根莖粗是影響油菜產(chǎn)量的重要農(nóng)藝性狀，二次有效分枝對(duì)產(chǎn)量起直接作用，而根莖粗主要是通過(guò)間接作用起到增產(chǎn)效果關(guān)鍵詞雙低油菜；國(guó)豪油8號(hào)；產(chǎn)量；播期；密度；施肥量；農(nóng)藝性狀；四川丘區(qū)中圖分類號(hào)S565.4文獻(xiàn)標(biāo)識(shí)碼A文章編號(hào)101007-5739（2017）06-0002-03EffectsofSeedingDate，PlantingDensityandFertili
3、zationonYieldandMainAgronomicCharactersofDirect-seedingDoubleLowRapeinHillyAreaofSichuanLIYing-chun1LUOHua-you2LIHong2TANGTian-ze1YANGYao2ZHANGTi-gang1LIUNian1FANQi-xin1LIZhi-fan1MENGDa-qing1（1MianyangAcademyofAgriculturalSciencesinSichuanProvince，MianyangSichuan621023；2ZitongCountyAgric
4、ulturalBureau）AbstractUsingternaryquadraticgeneralrotationalcombinationdesigntostudyagronomicmeasuresaffectingdoublelowrapeyield.thehighyieldcultivationmathematicalmodelofdoublelowrapeGuohaoyou8wasestablishedinhillyareaofSichuan，andthepathanalysisbetweeneightimportantagronomiccharactersa
5、ndplotyieldwasalsodiscussed.TheresultsshowedthatinhillyareaofSichuan，seedingdate，densityandfertilizationhadsignificanteffectontheyieldofGuohaoyou8.10Undertheconditionofthisexperiment，agronomicmeasureswhichcouldyieldmorethan2799kg/hm2forthevarietyasfollows：September25thto30thplanting，dens
6、ity450000～525000plants/hm2，fertilization0～750kg/hm2.Theorderofyieldincreasingeffectwasasfollows：sowingtime，density，sowingdateandfertilization.Theeffectofagronomictraitsonrapeyieldwasthenumberofeffectivepodsperplant>maininflorescenceeffectivesegmentlength>secondeffectivebranchnumber>effec
7、tivebranchheight>1000grainweight>plantheight>rootdiameter>firsteffectivebranchnumber.Thesecondeffectivebranchesandstemdiameterofdirectseedingrapeweretheimportantagronomictraitswhichaffectingtheyieldofrape，thesecondeffectivebranchesplayedadirectroleintheyield，andtherootoft
