摘要
探究不同养分添加对黑青杨、小黑杨和大青杨幼苗生长和养分分配的影响,旨在揭示3种杨树品种对养分的需求利用规律,为苗圃培育杨树苗木提供参考。以黑青杨、小黑杨和大青杨为材料,采用3因素3水平(N:1.5、3、6 g·株^(-1);P:0.75、1.5、3 g·株^(-1);K:0.5、1、2 g·株^(-1))L9(34)正交试验设计,以不施肥为对照,研究不同养分供给水平对不同杨树生长动态变化及养分分配的影响。结果表明:(1)不同养分供给对黑青杨、小黑杨和大青杨苗高、地径生长量在7月中旬开始影响差异显著。3个品种苗高、地径生长指数均在氮、磷、钾1水平时最大。黑青杨氮、磷、钾分别选择3、1、2水平时其生物量最大,小黑杨氮、磷、钾分别选择2、1、1水平时其生物量最大,大青杨氮、磷、钾均选择1水平时其生物量最大。氮、磷、钾对黑青杨和小黑杨生长指标影响排序为N大于P和K,而对大青杨生长指标影响排序为K大于N和P。(2)黑青杨、小黑杨和大青杨在根、茎和叶中氮、磷、钾积累量大小均为N大于P和K,3个品种各器官内氮的积累量都大于磷和钾的积累量。在3个杨树品种中,各器官3种养分积累量显著不同,其中3个品种的氮积累量分配比大小依次为茎、叶、根,黑青杨和小黑杨的磷积累量分配比大小依次为茎、叶、根,大青杨积累量分配比大小依次为根、茎、叶,黑青杨和大青杨钾积累量的分配比大小依次为根、茎、叶,而小黑杨钾积累量的分配比大小依次为根、茎、叶。(3)经过对各指标综合分析,评价得出氮、磷、钾配比N1P1K1为大青杨、黑青杨、小黑杨最佳施肥方案,即氮肥1.5 g·株^(-1),磷肥0.75 g·株^(-1),钾肥0.5 g·株^(-1)。
To explore the effects of different nutrient additions on the growth and nutrient content of Populus euramericana"N3016"×P.ussuriensis,Populus simonii×Populus nigra and Populus ussuriensis,and to revealthe nutrient demand and utilization rules of poplar,and to provide a reference for nursery cultivation of poplarseedlings,P.euramericana"N3016"×P.ussuriensis,Populus simonii×Populus nigra and Populus ussuriensis were used as materials,3 factors(N:nitrogen,P:phosphorus,K:potassium)and 3 levels(N:1.5,3,6 g;P:0.75,1.5,3 g;K:0.5,1,2 g,for per plant respectively.)L9(34)orthogonal experimental design were uesd,plants with no fertilization as control,and the effects of different nutrient supply levels on the growth dynamicsand nutrient distribution of different poplars were studied respectively.The results showed that:(1)Differentnutrient supply had significant effects on the growth of seedling height and ground diameter of P.euramericana"N3016"×P.ussuriensis,Populus simonii×Populus nigra and Populus ussuriensis from the middle of July.The height and base diameter growth index of three tree species was the highest at NPK 1 level respectively.Thebiomass of P.euramericana"N3016"×P.ussuriensis was the highest when N,P and K was selected at 3,1 and2 level respectively.The biomass of Populus simonii×Populus nigra was the highest when N,P and K level was2,1,1,respectively.The biomass of Populus ussuriensis was the highest when N,P and K level was 1,respectively.The effects of N,P and K on the growth indexes of P.euramericana"N3016"×P.ussuriensis andPopulus simonii×Populus nigra was N>P and K,while the effects of N,P and K on the growth indexes ofPopulus ussuriensis was K>N and P.(2)The accumulation of nitrogen,phosphorus and potassium in roots,stemsand leaves of P.euramericana"N3016"×P.ussuriensis,Populus simonii×Populus nigra and Populus ussuriensis was N>P,K.The accumulation of nitrogen in each organ of the 3 varieties was greater than that ofphosphorus and potassium.Among the 3 poplar varieties,the accumulation o
作者
孙国语
马晓雨
易嘉欣
张芳平
张春华
李开隆
SUN Guo-Yu;MA Xiao-Yu;YI Jia-Xin;ZHANG Fang-Ping;ZHANG Chun-Hua;LI Kai-Long(State Key Laboratory of Tree Genetics and Breeding,Northeast Forestry University,Harbin 150040;Fujin Forestry Bureau Heilongjiang Province,Fujin 156100)
出处
《植物研究》
CAS
CSCD
北大核心
2021年第5期690-699,共10页
Bulletin of Botanical Research
基金
‘十三五’国家重点研发计划(2016YFD0600404)。
关键词
苗高
地径
生物量
氮
磷
钾
seedling height
base diameter
biomass
nitrogen
phosphorus
potassium
