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华北农学报 1993

Patiencewithdensityandreasonableuseofdifferentplanttypesinmaizehybrids

DOI: 10.7668/hbnxb.1993.S2.021, PP. 118-122

李玉玲,苏祯禄,孙书库,梁本国,刘征

Keywords: maize,hybrid,density,planttype

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Abstract:

TheappropriatedensityofthehybridswithdifferentplantmorphotypesandgrainyieldofmainmaizehybridsinHenanprovinceunderdifferentconditionsandindifferentplaceshavebeenstudiedformanyyears.Theresultsindicaltethatallthelightintensityinmiddleandlowpartoftheplant,thesingleleafweight(SLW)andthephotosyntheticintensitydecreasere-markablywiththeincreaseofplantdensityandleafareaindex(LAI),andthatallthecharactersofthesirgleplantyieldbecorneinferiorwithdifferentmagnitudes.Buttheseriousnessisslighterforcompacttypehybridsthanthatforspreadones.Underhighyieldcondition,thedesirabledensityis4250to5000plantspermu(666.67m~2)forcompactmaizehybridsand3300to3500plantsforspreadones.Theyielddifferencesbetweenthetwokindsofhybridvarywiththeyieldlevels.

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