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《稻草覆蓋對(duì)亞熱帶紅壤旱坡地玉米旱期生長(zhǎng)的生理調(diào)節(jié)作用及其產(chǎn)量效應(yīng)》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、生態(tài)與農(nóng)村環(huán)境學(xué)報(bào)2007,23(4):18-23,56JournalofEcologyandRuralEnvironment稻草覆蓋對(duì)亞熱帶紅壤旱坡地玉米旱期生長(zhǎng)的生理調(diào)節(jié)作用及其產(chǎn)量效應(yīng)1,31,211,3劉迎新,王凱榮,謝小立,蘇衍濤(1.中國(guó)科學(xué)院亞熱帶農(nóng)業(yè)生態(tài)研究所桃源農(nóng)田生態(tài)系統(tǒng)國(guó)家科學(xué)觀測(cè)研究站,湖南長(zhǎng)沙410125;2.青島農(nóng)業(yè)大學(xué)農(nóng)業(yè)生態(tài)與環(huán)境健康研究所,山東青島266109;3.中國(guó)科學(xué)院研究生院,北京100039)摘要:對(duì)不同稻草覆蓋量處理下亞熱帶旱坡地紅壤水分、溫度變化和玉米不同生育期生理指標(biāo)值的測(cè)定結(jié)果表明,在有旱無(wú)災(zāi)年
2、份,稻草覆蓋可以明顯地緩解表層(010cm)土壤含水量減少和調(diào)節(jié)土壤溫度。稻草覆蓋可減輕玉米旱害,其效果隨著覆蓋量的加大而越明顯,但受干旱程度和生育期影響。拔節(jié)期遇旱,稻草覆蓋可以維持-2玉米的生理活性,覆蓋稻草15t!hm處理與其他處理之間存在顯著性差異;但隨生育期的推移和后期降雨頻度的增加,各處理間玉米生理指標(biāo)值差異減小,灌漿期和成熟期差異不明顯。稻草覆蓋可以增加玉米生物量和籽粒-2-2產(chǎn)量,覆蓋稻草15t!hm處理(T3)生物量最大,覆蓋稻草5t!hm處理(T1)產(chǎn)量最高,其原因主要是受旱時(shí)期為拔節(jié)期,造成處理T3貪青生長(zhǎng),但對(duì)處理T1后期生理機(jī)制影響不
3、大。關(guān)鍵詞:稻草覆蓋;紅壤旱坡地;土壤水分;生理指標(biāo);夏玉米中圖分類號(hào):S181;S311文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1673-4831(2007)04-0018-06EffectofStrawMulchingonPhysiologicalAdjustmentandOutputofMaizeGrowingonSubtropicalRedSoilSl1,31,211,3opelandinDrySeason.LIUYingxin,WANGKairong,XIEXiaoli,SUYantao(1.NationalObservationStationof
4、TaoyuanAgroEcologySystem,InstituteofSubtropicalAgriculture,ChineseAcademyofSciences,Changsha410125,China;2.InstituteofAgricultureEcologicalandEnvironmentalHealth,QingdaoAgriculturalUniversity,Qingdao266109,China;3.GraduateSchoolofChineseAcademyofSciences,Beijing100039,China)Abstr
5、act:Resultsofdeterminationofsoilmoisture,soiltemperature,andphysiologicalcharacteristicsofmaizegrowinginplotsdifferentinmulchingtreatmentshowedthatstrawmulchingcouldminishtherangeofvariationofsoilmoistureandtemperatureinthesurfacesoillayerof0-10cm;thusmitigatingharmofdroughtonthecro
6、p.Thethickerthestrawmulching,themoresignificanttheeffect.Buttheeffectwaslimitedbysoilaridnessandgrowthstageofmaize.Forinstance,attheelongationstage,strawmulchingmaymaintainphysiologicalactivityofthecropandsignificantdifferenceinthis-2effectwasobservedbetweenTreatmentT3(15t!hm)andot
7、hertreatments.Butalongwithgrowthofthecropandincreasingfrequencyofrainfallthedifferencegraduallynarrowed.Atthemilkingandmaturingstages,theeffectwasinsignificant.Mulchingmayincreasetheyieldofbiomassandgrainsofthecrop.Intheexperiment,TreatmentT1(5t!-2hm)wasthehighestingrainyieldwhere
8、asTreatmentT3inbiom
