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时间:2019-05-17
《密度和施氮量对沿海滩涂中度盐碱地蓖麻磷素吸收的影响》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2011年1O月中国油料作物学报2011,33(5):482—486Chinesejournalofoilcropsciences密度和施氮量对沿海滩涂中度盐碱地蓖麻磷素吸收的影响周桂生,李军,童晨,董伟伟,夏玉荣,陆建飞,封超年(1.江苏省扬州大学作物遗传生理重点实验室,江苏扬州,225009;2.扬州大学农业部长江中下游作物生理生态栽培重点实验室,江苏扬州,225009)摘要:以淄蓖5号和云蓖泰国202为试验品种,研究沿海滩涂中度盐碱地不同种植密度和施氮量条件下蓖麻磷吸收的特点及与产量的关系。结果表明,蓖麻苗期磷吸收百分率和吸收速率很低
2、,蕾期显著增加,开花期达到高峰,花果期和灌浆成熟期逐渐降低。与淄蓖5号相比,云蓖泰国202在苗期吸收百分率和吸收速率较低,蕾期差异不大,开花期明显增高,灌浆成熟期仍保持着较高的磷吸收量。淄蓖5号在种植密度13000株·hm~、施氮量120·hmI2条件下产量最高,每生产100kg的蓖麻籽吸收磷1.23kg。云蓖泰国202在种植密度16000株·hm~,施氮量120kg·hm的条件下产量最高,每生产100kg的蓖麻籽吸收磷1.10~1.13kg。由于盐碱地土壤中的有效磷含量较低,在本试验条件下即使施用50kg·hmI2的PO仍不能满足蓖麻对磷
3、的需要,要进一步提高蓖麻产量还需加大磷肥投入。关键词:蓖麻;种植密度;施氮量;磷吸收;产量中图分类号:$565.606文献标识码:A文章编号:1007—9084(2011)05—0482—05CharacteristicsofphosphorusabsorptionincastorplantsgrownonmediumcoastalsalinesoilunderdiferentplantingdensitiesandnitrogenapplicationquantityZHOUGui—sheng.LIJun.一,TONGChen,DONGW
4、ei—wei,XIAYu—rong,,LUJian—fei一,FENGChao—nian'(1.JiangsuProvincialKeyLabofCropGenetics&P7iology,YangzhouUniversity,Yangzhou225009,China;2.LabofCropPhysiology,Ecology,andCultivationintheMiddleandLowerReachesofYangtzeRiverofMinistryofAgriculture,YangzhouUniversity,Yangzhou,22
5、5009,China)Abstract:Phosphorusisanessentialmacro—nutrienttocropgrowthandyielddevelopment,especiallyundersalineconditionswherephosphorusshortageusuallyposesathreat.WithZibi5andYunbi—TCO202asthetestedcultivars,thisstudyinvestigatedthephosphorusabsorptionofcastorplantsgrownon
6、mediumsalinesoilanditsre—lationshipwithcastorbeanyield.Theabsorptionpercentageandrateofphosphoruswerethelowestatseedlingstage,graduallyincreasedatbuddingstage,reachedthepeakduringfloweringstage,anddeclinedafterfloweringandduringfruitingstage,grainfillingandripeningstage.Co
7、mparedwithZibi5,theabsorptionpercentageandrateofphosphorusofYunbiTCO一202washigheratthestagesofseedling,flowering,grainfillingandripening.Undertheconditionsof13000plant·hm~plantingdensityand120kg·hm~nitrogenapplication.fhecastorbeanyieldandtheamountofphosphorusofZibi5wereth
8、ehighestand1.23kgphosphoruswasabsorbedtopro—duee100kgcastorbean.Undertheconditionsof16000
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