草原与草坪
草原與草坪
초원여초평
GRASSLAND AND TURF
2015年
2期
9-14
,共6页
紫花苜蓿%氮素形态%不同部位%氮含量
紫花苜蓿%氮素形態%不同部位%氮含量
자화목숙%담소형태%불동부위%담함량
alfalfa%nitrogen forms%different parts%content of nitrogen
在完全营养液条件下,采用砂培法,研究了2种氮素形态(NO-3-N,NH +4-N)和5个氮素水平(0、105、210、315、420 mg/L)对紫花苜蓿品种“甘农3号”和“陇东苜蓿”幼苗各部位氮含量的影响。结果表明：施氮处理下各部位 NO-3-N 含量、NH +4-N 含量和全氮含量均显著高于 CK(P <0.05)。“甘农3号”和“陇东苜蓿”2个品种的各部位氮含量变化一致,均随施氮水平的升高呈先增加后降低的趋势,但峰值表现不一。同一氮素形态及水平下,不同部位 NO-3-N、NH +4-N 及全氮含量表现为：叶>根>茎。“甘农3号”在 NO-3-210处理下叶、茎、根中 NO-3-N 含量最优,分别为490,385和463μg/g；“陇东苜蓿”分别为473,355和447μg/g。“甘农3号”在 NH +4-210处理下叶、茎、根中 NH +4-N 含量最优,分别为212,182和194μg/g；“陇东苜蓿”茎和根中含量分别为177μg/g、178μg/g,叶却在 NH +4-315处理最大,为189μg/g。“甘农3号”在 NH +4-315处理下叶、茎、根中全氮含量最优,分别为4.25%,1.7%和3.47%；“陇东苜蓿”叶和根中含量分别为4.01%、3.08%,茎却在 NH +4-210处理最大,为2.33%。对于同一部位除“陇东苜蓿”茎全氮含量高于“甘农3号”外,其他部位的 NO-3-N、NH +4-N 和全氮含量均表现为“甘农3号”优于“陇东苜蓿”。
在完全營養液條件下,採用砂培法,研究瞭2種氮素形態(NO-3-N,NH +4-N)和5箇氮素水平(0、105、210、315、420 mg/L)對紫花苜蓿品種“甘農3號”和“隴東苜蓿”幼苗各部位氮含量的影響。結果錶明：施氮處理下各部位 NO-3-N 含量、NH +4-N 含量和全氮含量均顯著高于 CK(P <0.05)。“甘農3號”和“隴東苜蓿”2箇品種的各部位氮含量變化一緻,均隨施氮水平的升高呈先增加後降低的趨勢,但峰值錶現不一。同一氮素形態及水平下,不同部位 NO-3-N、NH +4-N 及全氮含量錶現為：葉>根>莖。“甘農3號”在 NO-3-210處理下葉、莖、根中 NO-3-N 含量最優,分彆為490,385和463μg/g；“隴東苜蓿”分彆為473,355和447μg/g。“甘農3號”在 NH +4-210處理下葉、莖、根中 NH +4-N 含量最優,分彆為212,182和194μg/g；“隴東苜蓿”莖和根中含量分彆為177μg/g、178μg/g,葉卻在 NH +4-315處理最大,為189μg/g。“甘農3號”在 NH +4-315處理下葉、莖、根中全氮含量最優,分彆為4.25%,1.7%和3.47%；“隴東苜蓿”葉和根中含量分彆為4.01%、3.08%,莖卻在 NH +4-210處理最大,為2.33%。對于同一部位除“隴東苜蓿”莖全氮含量高于“甘農3號”外,其他部位的 NO-3-N、NH +4-N 和全氮含量均錶現為“甘農3號”優于“隴東苜蓿”。
재완전영양액조건하,채용사배법,연구료2충담소형태(NO-3-N,NH +4-N)화5개담소수평(0、105、210、315、420 mg/L)대자화목숙품충“감농3호”화“롱동목숙”유묘각부위담함량적영향。결과표명：시담처리하각부위 NO-3-N 함량、NH +4-N 함량화전담함량균현저고우 CK(P <0.05)。“감농3호”화“롱동목숙”2개품충적각부위담함량변화일치,균수시담수평적승고정선증가후강저적추세,단봉치표현불일。동일담소형태급수평하,불동부위 NO-3-N、NH +4-N 급전담함량표현위：협>근>경。“감농3호”재 NO-3-210처리하협、경、근중 NO-3-N 함량최우,분별위490,385화463μg/g；“롱동목숙”분별위473,355화447μg/g。“감농3호”재 NH +4-210처리하협、경、근중 NH +4-N 함량최우,분별위212,182화194μg/g；“롱동목숙”경화근중함량분별위177μg/g、178μg/g,협각재 NH +4-315처리최대,위189μg/g。“감농3호”재 NH +4-315처리하협、경、근중전담함량최우,분별위4.25%,1.7%화3.47%；“롱동목숙”협화근중함량분별위4.01%、3.08%,경각재 NH +4-210처리최대,위2.33%。대우동일부위제“롱동목숙”경전담함량고우“감농3호”외,기타부위적 NO-3-N、NH +4-N 화전담함량균표현위“감농3호”우우“롱동목숙”。
Under the condition of complete nutrient solution,the effect of two kinds of nitrogen forms (ni-trate nitrogen and ammonium nitrogen)and five nitrogen levels (0,105,210,315,420 mg/L)on content of ni-trogen in different parts of Medicago sativa L.cv.Gannong No.3 and Medicago sativa L.cv.Longdong were studied at seedling stage by sand culture method.The results showed that the content of NO-3 -N,the content of NH +4 -N and total nitrogen content in different parts of alfalfa under nitrogen treatments were significantly high-er than that of CK(P <0.05).Gannong No.3 and Longdong had same variation of nitrogen content in different parts.The variation showed a trend of increased first and then decreased with the increase of nitrogen level,but the maximum were not the same.Under the same nitrogen form and level,the content of NO-3 -N,the content of NH +4 -N and total nitrogen content in different parts of alfalfa showed:leaf > root > stem.Under the best treatment with NO-3 -210 to ‘Gannon No.3’,the content of NO-3 -N in leave,stem,root were 490 μg/g,385 μg/g,463 μg/g,respectively.they were 473 μg/g,355 μg/g,447 μg/g in alfalfa of ‘Longdong’.Under the best treatment with NH +4 -210 to ‘Gannon No.3’,the content of NH +4 -N in leave,stem,root were 212 μg/g,182 μg/g,1 94 μg/g.The content of NH +4 -N in stem and root of ‘Longdong’were 177 μg/g and 178 μg/g,but the best treatment in leaf was NH +4 -315,it was 189 μg/g.Besides,under the best treatment with NH +4 -315 to ‘Gannon No.3’,the total nitrogen content in leave,stem,root were 4.25%,1.7%,3.47%,repectively.The total nitrogen content in leaf and root of ‘Longdong’were 4.01% and 3.08%,but the best treatment in stem was NH +4 -210, it was 2.33%.For the same part,the nitrogen content of ‘Longdong’was higher than ‘Gannon No.3’in stem, but the content of NO-3 -N,NH +4 -N and total nitrogen in the other parts of ‘Gannon No.3’were higher than that of ‘Longdong’.
