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1、浙江大學(xué)學(xué)報(bào)(農(nóng)業(yè)與生命科學(xué)版)38(3)：318-328，2012JournalofZhejiangUniversity(Agric．8LLifeSci．)文章編號(hào)：1008—9209(2012)03—0318—11DOI：10．3785／j．issn．1008—9209．2012．03．013-磷鉀對(duì)套作大豆干物質(zhì)積累與分配及產(chǎn)量的影響雷婷，向達(dá)兵，郭凱，楊文鈺，劉增禹，陳小容(四川農(nóng)業(yè)大學(xué)農(nóng)學(xué)院，四川雅安625014)摘要在“玉／豆”套作模式下，采用隨機(jī)區(qū)組設(shè)計(jì)，研究磷、鉀營(yíng)養(yǎng)對(duì)套作大豆干物質(zhì)積累、分配及產(chǎn)量的影響．結(jié)果表明：完熟期套作大豆干物質(zhì)積累總量及根、莖、葉、
2、莢各器官干物質(zhì)積累量均隨施鉀量增加而增加，隨施磷量增加呈先升高后降低的趨勢(shì)，且都以P2K3(P2O17kg．hm_。，K2Ol12．5kg．hm)處理最高；莖稈、葉片干物質(zhì)積累量隨生育時(shí)期均呈單峰曲線變化，各時(shí)期干物質(zhì)積累量隨施鉀、施磷量增加的變化與干物質(zhì)積累總量表現(xiàn)一致(茍期除外)；完熟期干物質(zhì)向莢果的分配比例隨施鉀量增加而增加，隨施磷量增加呈先增加后減少的趨勢(shì)，而向莖稈和葉片則表現(xiàn)為相反的趨勢(shì)；增施磷、鉀肥能夠提高營(yíng)養(yǎng)器官干物質(zhì)向莢果的轉(zhuǎn)移量、轉(zhuǎn)移率及其對(duì)莢果的貢獻(xiàn)率和產(chǎn)量，以PK。產(chǎn)量最高，為2832．O4kg．hm_，顯著高于其他處理．關(guān)鍵詞磷；鉀；套作大豆；干物質(zhì)
3、積累與分配；產(chǎn)量中圖分類號(hào)S565．1；S143文獻(xiàn)標(biāo)志碼AIElTing，XIANGDa—bing，GUOKai，YANGWen-yu，LIUZeng—yu，CHENXiao—rong(CollegeofAgronomy，SichuanAgriculturalUniversity，Yaan，Sichuan625014，China)Effectsofphosphorusandpotassiumfertilizersondrymatteraccumulation，distributionandyieldofrelaystripintercroppingsoybean．Jour
4、nalofZhejiangUniversity(Agric．&LifeSci．)，2012，38(3)：318—328AbstractTheeffectsofphosphorus(P)andpotassium(K)fertilizersondrymatteraccumulation，distributionandyieldofsoybeanwerestudiedbyrandomizedblockdesigninrelaystripintercroppingsystemofmaize—soybean．Theresultsshowedthatdrymatteraccumulat
5、ionsofwholeplantandeachorgan(root，stem，leafandlegume)atthefullmaturestageallincreasedwithincreasingKapplicationamount，whileincreasedatfirstandthendecreasedwiththeincreaseofPapplicationamount，andthedrymatteraccumulationsofwholeplantandeachorganallreachedthehighestunderthePzK3(P2O517kg．hm，K2
6、O112．5kg．hm)treatment．Thechangesofdrymatteraccumulationsofstemsandleavesinthewholeperiodshowedasinglepeakcurve，andthechangesofdrymatteraccumulationinwholeperiodwiththeincreaseofKandPapplicationamountwereallsimilartothatofdrymatteraccumulationofwholeplant(exceptseedlingstage)．Thedistributio
7、nproportionofthedrymatterfromplanttolegumesincreasedwiththeincreaseofKapplicationamount，whilethedistributionrateincreasedatfirstandthenreducedwiththeincreaseofPapplicationamount．Butthechangesofthedistributionrateof收稿日期：2011-0803基金項(xiàng)目：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃“973”資助項(xiàng)目(2011C
