CAJ | 학술논문

在总氮(N)浓度相等的条件下,研究全硝营养(100% NO_3~-)和25% 增铵营养(NH_4~+∶NO_3~- = 25%∶75%)对开花期和幼果期番茄植株伤流液各组分含量的影响.结果表明,增铵营养显著增加幼果期伤流液中 K的含量,对Ca、Mg、P元素含量没有显著影响;增铵营养下伤流液中 NO_3~- 的含量下降、NH_4~+ 含量增加,氨基酸、苹果酸等的含量均显著增加,氨基酸/硝态氮含量之比显著提高,表明喜硝作物适当增铵不仅能够提高根系活力,显著促进K的吸收以供果实发育之需,而且提高了植株整体同化N素的能力.
재총담(N)농도상등적조건하,연구전초영양(100% NO_3~-)화25% 증안영양(NH_4~+∶NO_3~- = 25%∶75%)대개화기화유과기번가식주상류액각조분함량적영향.결과표명,증안영양현저증가유과기상류액중 K적함량,대Ca、Mg、P원소함량몰유현저영향;증안영양하상류액중 NO_3~- 적함량하강、NH_4~+ 함량증가,안기산、평과산등적함량균현저증가,안기산/초태담함량지비현저제고,표명희초작물괄당증안불부능구제고근계활력,현저촉진K적흡수이공과실발육지수,이차제고료식주정체동화N소적능력.
The xylem sap was collected in two growing stages to investigate the effects of enhanced ammonium nutrition (25% replacement of NO_3~- -N by NH_4~+-N) on the contents of NH_4~+, NO_3~-, Ca, Mg, K, P, soluble carbohydrate, amino acid, and organic acids during tomato maturation. The results showed that the contents of K, NH_4~+, amino acid, soluble carbohydrate and malate, the ratio of amino acid content to NO_3~- in xylem sap increased significantly under enhanced ammonium nutrition in young fruit stage, while NO_3~- content decreased significantly. No significant effect on the contents of Ca, Mg and P, which indicated that comparing to the single nitrate in solution, enhanced ammonium nutrition could not only improve the root activity in absorbing enough K to meet the requirement of fruit development, but also increase the ability of N metabolism.