机构地区:[1]Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029 (China) [2]College of Geography and Resource Sciences, Sichuan Normal University, Chengdu 610066 (China) [3]Department of Crop and Soil Sciences, the Pennsylvania State University (USA) [4]College of Resources and Environment, China Agricultural University, Beijing 100094 (China)
出 处:《Pedosphere》2007年第5期595-600,共6页土壤圈(英文版)
基 金:Project supported by the National Natural Science Foundation of China (No.30370838).
摘 要:A hydroponic experiment was carried out to determine the influence of replacing 20% of nitrate-N in nutrient solutions with 20 individual amino acids on growth, nitrate accumulation, and concentrations of nitrogen (N), phosphorus (P), and potassium (K) in pak-choi (Brassica chinensis L.) shoots. When 20% of nitrate-N was replaced with arginine (Arg) compared to the full nitrate treatment, pak-choi shoot fresh and dry weights increased significantly (P ≤ 0.05), but when 20% of nitrate-N was replaced with alanine (Ala), valine (Val), leucine (Leu), isoleucine (Ile), proline (Pro), phenylalanine (Phe), methionine (Met), aspartic acid (Asp), glutamic acid (Glu), lysine (Lys), glycine (Gly), serine (Ser), threonine (Thr), cysteine (Cys), and tyrosine (Tyr), shoot fresh and dry weights decreased significantly (P ≤ 0.05). After replacing 20% of nitrate-N with asparagine (Asn) and glutamine (Gin), shoot fresh and dry weights were unaffected. Compared to the full nitrate treatment, amino acid replacement treatments, except for Cys, Gly, histidine (His), and Arg, significantly reduced (P ≤0.05) nitrate concentrations in plant shoots. Except for Cys, Leu, Pro, and Met, total N concentrations in plant tissues of the other amino acid treatments significantly increased (P ≤ 0.05). Amino acids also affected total P and K concentrations, but the effects differed depending on individual amino acids. To improve pak-choi shoot quality, Gln and Asn, due to their insignificant effects on pak-choi growth, their significant reduction in nitrate concentrations, and their increase in macroelement content in plants, may be used to partially replace nitrate-N.一个水耕法的实验被执行决定在小白菜(Brassica chinensis L.) 在氮(N) ,磷(P) ,和钾(K) 的生长,硝酸盐累积,和集中上用 20 单个氨基酸在营养液代替 20% nitrate-N 的影响射击。20% nitrate-N 什么时候与完整的硝酸盐处理,新鲜的小白菜射击和干燥重量相比被精氨酸( Arg )代替,但是20% nitrate-N 什么时候被丙氨酸(翼)代替,显著地增加了( P ≤ 0.05 ),缬氨酸(瓦尔),白氨酸(列伊),异白氨酸( Ile ),脯氨酸(专业版),本氨基丙酸( Phe ),蛋氨酸(相遇),天门冬酸(毒蛇), glutamic ( Glu ),离氨酸( Lys ),甘氨酸( Gly ),丝氨酸(重量的单位),苏氨酸( Thr ),半胱氨酸( Cys ),和酷氨酸( Tyr ),新鲜的射击和干燥重量显著地减少了( P ≤ 0.05 )。在用天门冬素(Asn ) 和夫酸安(Gln ) 代替 20% nitrate-N 以后,新鲜的射击和干燥重量是未受影响的。比作完整的硝酸盐处理,氨基酸代替处理除了 Cys, Gly,组氨酸(他的) ,并且 Arg,显著地减少了(P ≤ 0.05 ) 在植物射击的硝酸盐集中。显著地除了 Cys,列伊,专业版,和在另外的氨基酸处理的植物组织的遇见的、全部的 N 集中增加了(P ≤ 0.05 ) 。氨基酸也影响了全部的 P 和 K 集中,但是效果不同取决于单个氨基酸。改进小白菜射击质量, Gln 和 Asn 由于他们小白菜生长上的不足道的效果,他们在硝酸盐集中的重要减小,和他们宏元素的增加在植物满足,可以被用来部分代替 nitrate-N。
关 键 词:amino acids GROWTH N P and K nitrate accumulation pak-choi
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...