贵州农业科学
貴州農業科學
귀주농업과학
GUIZHOU AGRICULTURAL SCIENCES
2015年
4期
42-47,53
,共7页
油茶%氮肥%光合特性%土壤肥力
油茶%氮肥%光閤特性%土壤肥力
유다%담비%광합특성%토양비력
Camellia oleifera%nitrogen%photosynthetic characteristics%soil fertility
为油茶优质高产栽培提供科学依据,在保证试验区土壤基质、环境条件和管理模式相同的条件下,研究低氮(20 g/m2)、中氮(40 g/m2)和高氮(60 g/m2)3个施用水平对油茶光合生长特性及土壤肥力的影响。结果表明:施氮能促进油茶光合生长特性和提高土壤肥力,随着施氮水平的提高,油茶光合生长特性和土壤肥力变化依次为中氮>高氮>低氮>CK;不同处理油茶的净光合速率(Pn)日变化均呈双峰曲线,气孔限制导致了光合“午休”现象,胞间 CO2浓度(Ci)、气孔导度(Gs)和蒸腾速率(EVAP)的日变化随时间呈“W”变化规律,施氮未改变油茶的光合日变化趋势;光饱和点(LSP)、光补偿点(LCP)、表观量资产额(AQY)、羧化效率(CE)、叶绿素 a/b、可溶性蛋白、可溶性糖、光合氮利用效率(NUE)和光合磷利用效率(PUE)均随氮素的增加呈先增加后降低趋势,依次为中氮>高氮>低氮>CK,可溶性蛋白和光合磷利用效率(PUE)与对照的差异不显著(P >0.05)。施氮可改善油茶的品质,增加油茶土壤肥力;土壤碱解氮和微生物量可作不同水平施氮处理后油茶土壤养分变化的敏感指标。
為油茶優質高產栽培提供科學依據,在保證試驗區土壤基質、環境條件和管理模式相同的條件下,研究低氮(20 g/m2)、中氮(40 g/m2)和高氮(60 g/m2)3箇施用水平對油茶光閤生長特性及土壤肥力的影響。結果錶明:施氮能促進油茶光閤生長特性和提高土壤肥力,隨著施氮水平的提高,油茶光閤生長特性和土壤肥力變化依次為中氮>高氮>低氮>CK;不同處理油茶的淨光閤速率(Pn)日變化均呈雙峰麯線,氣孔限製導緻瞭光閤“午休”現象,胞間 CO2濃度(Ci)、氣孔導度(Gs)和蒸騰速率(EVAP)的日變化隨時間呈“W”變化規律,施氮未改變油茶的光閤日變化趨勢;光飽和點(LSP)、光補償點(LCP)、錶觀量資產額(AQY)、羧化效率(CE)、葉綠素 a/b、可溶性蛋白、可溶性糖、光閤氮利用效率(NUE)和光閤燐利用效率(PUE)均隨氮素的增加呈先增加後降低趨勢,依次為中氮>高氮>低氮>CK,可溶性蛋白和光閤燐利用效率(PUE)與對照的差異不顯著(P >0.05)。施氮可改善油茶的品質,增加油茶土壤肥力;土壤堿解氮和微生物量可作不同水平施氮處理後油茶土壤養分變化的敏感指標。
위유다우질고산재배제공과학의거,재보증시험구토양기질、배경조건화관리모식상동적조건하,연구저담(20 g/m2)、중담(40 g/m2)화고담(60 g/m2)3개시용수평대유다광합생장특성급토양비력적영향。결과표명:시담능촉진유다광합생장특성화제고토양비력,수착시담수평적제고,유다광합생장특성화토양비력변화의차위중담>고담>저담>CK;불동처리유다적정광합속솔(Pn)일변화균정쌍봉곡선,기공한제도치료광합“오휴”현상,포간 CO2농도(Ci)、기공도도(Gs)화증등속솔(EVAP)적일변화수시간정“W”변화규률,시담미개변유다적광합일변화추세;광포화점(LSP)、광보상점(LCP)、표관량자산액(AQY)、최화효솔(CE)、협록소 a/b、가용성단백、가용성당、광합담이용효솔(NUE)화광합린이용효솔(PUE)균수담소적증가정선증가후강저추세,의차위중담>고담>저담>CK,가용성단백화광합린이용효솔(PUE)여대조적차이불현저(P >0.05)。시담가개선유다적품질,증가유다토양비력;토양감해담화미생물량가작불동수평시담처리후유다토양양분변화적민감지표。
The effects of different nitrogen levels (LN,20g/m2 ;MN 40g/m2 and HN 60g/m2)on growth, photosynthetic characteristics and soil fertility of C.oleifera were studied under the same conditions of soil substances,environment and management to provide the scientific basis for high quality and high yield cultivation of C.oleifera. Applying nitrogen can promote growth, photosynthetic characteristics and soil fertility of C.oleifera,and variation in growth,photosynthetic characteristics and soil fertility of C.oleifera is MN>HN>LN>CK.Pn diurnal variation of different treatments presents a double-peak curve and stomatal limitation results in photosyntheticlunch break phenomenon.Diurnal variation of Ci,Gs and Tr shows the W law and applying nitrogen does not change photosynthetic diurnal variation trend of C.oleifera.LSP,LCP,AQY,CE,chlorophyll a/b,soluble protein,soluble sugar, NUE and PUE of C.oleifera of different treatments all present a first rise and then decline trend with increase of nitrogen level,but there are no significant differences in soluble protein and PUE between treatments and CK.Applying nitrogen can improve quality and feeding value of C.oleifera and soil fertility.Soil available nitrogen and microbial biomass can be used as the sensitive indexes for nutritional variation of C.oleifera soil applied with different nitrogen levels.