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1、江西農(nóng)業(yè)大學(xué)碩士學(xué)位論文有機無機肥配施對棉花的生物學(xué)效應(yīng)及氮素去向的追蹤研究姓名:鐘有林申請學(xué)位級別:碩士專業(yè):作物栽培學(xué)與耕作學(xué)指導(dǎo)教師:張美良2003.6.1江西農(nóng)業(yè)大學(xué)碩士學(xué)位論文摘要采用模擬試驗方法,研究了棉田生態(tài)系統(tǒng)中有機和無機態(tài)肥料N對棉花產(chǎn)量及其構(gòu)成因素、干物質(zhì)積累和分配、棉葉含N量和土壤全N量的效應(yīng);并應(yīng)用”N示蹤法,對等N、P、K條件下不同肥料結(jié)構(gòu)處理盆栽棉N素去向進行-r追蹤。結(jié)果證明:i、施用N肥能促進各生育時期棉株和各器官干物質(zhì)積累、增加LAI雨I棉l什I含N量、改善棉株農(nóng)藝性狀、極顯著提高單
2、位面積總鈴數(shù)和棉花產(chǎn)景。2、有機和無機配施有利于棉株對土壤N和肥料N的吸收;棉株生育前期剝土壤N的依賴性較高,后期對肥料N依賴性較高;不I吾Ju,J‘期施N對各器官的貢獻牢也暗示了重施化肥作花鈴肥的重要性。3、在等N、P、K條件下,綠肥+沼肥+化肥配施對于增加棉株和生殖器官干物量、提高不同生育時期棉株各器官干物量和N素合理分配、使棉花生育后期LAI和棉IIf含N量維持在較高水平、最終提高棉花單位面積總鈴數(shù)平¨產(chǎn)點I效果較好,綠肥與化肥配施次之,單施無機N肥較差。4、不施N肥和單施無機N肥將降低土壤全N量,有機無機態(tài)肥
3、料配施能明顯提高土壤全N量:有機和無機肥配施,其肥料N在土壤中的殘留量為單施化肥的1.57~3.3l倍,而損失量后者為前者的1.2l~2.57倍,表明有機羽I無機肥配施改二I:效益明顯。關(guān)鍵詞:棉花、有機無機肥配施、生物學(xué)效應(yīng)、”N示蹤、氮素去向江西農(nóng)業(yè)大學(xué)碩士學(xué)位論文第1I頁共3D頁AbstractsThisthesisstudiedtheeffectsofcottonyieldandyieldconstitutes,drymatteraccumulationanddistribution,leafnitrogen
4、andsoiltotalnitrogenusingsimulatingexperimentationmethod,whileitalsoresearchedthetraceofthenitrogenofthepottedcot'lonunderthedifferentfertilizerstructuretreatmentsOlltheconditionofthesamequantitiesnitrogen,phosphateandpotassiumusing”Ntracingmethod,Theresultsare
5、asfoIlows:1NitrogenapplicationcouldincreasethedrymatteraccumulationofeachbearingperiodofthecottonplantandtheorgansincreaseLAIandleafnitrogen;improveagronomiccharacterofthecottonplant,significantlyincreasedperunitareabollsandcottonyield.2Cooperatedapplicationofo
6、rganicandinorganicfertilizerwasusefulforthesoilnitrogenandfertilizernitrogenabsorptionbythecottonplantNitrogendependabilityofthecottonplantwashighonsoilattheearlystage,whilethatofthelatestagewashigh011fertilizer.Thecontributionofthenitrogenapplicationofthediffe
7、rentstagetodifferentorgansimpliedtheimportanceofchemicalfertilizerweightilyapplicationasflowerandbollfertilizer.3Underthesamequantitiesnitrogen,phosphateandpotassium,cooperatedapplicationofgreenmanure,methanemangreandchemicalfertdizerwasusefulfortheincreaseofdr
8、ymatterofcottonplantandthetotalorgans,improvementsofrationaldistributionofdrymatterandnitrogenatdifferentstages,themaintainofhighlevelofLA[andleafnitrogenatthelatestageofthe