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首页> 外文期刊>African Journal of Biotechnology >Growth and nutrient uptake responses of Seolhyang strawberry to various ratios of ammonium to nitrate nitrogen in nutrient solution culture using inert media
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Growth and nutrient uptake responses of Seolhyang strawberry to various ratios of ammonium to nitrate nitrogen in nutrient solution culture using inert media

机译：使用惰性培养基在营养液培养中，Seolhyang草莓的生长和养分吸收对铵态氮与硝态氮的不同比例的反应

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The effect of the variation of?NH4+:NO3?ratios (meq/l:?0:100, 40:60, 50:50, 65:35 and 100:0) in the nutrient solution on strawberry (Fragaria × ananassa?var Seolhyang) growth was evaluated. A mixture of large particle size (2?to?5 mm) and small particle size (smaller than 1 mm) of perlite was?used as growing substrateand the nutrient solutions were applied once a week to the root substrate. The growth responses were determined 120 days after transplanting. The use of NO3?as the sole source of nitrogen in the nutrient solution?resulted in the highestvegetative growth?among the treatments tested.?On the contrary, the exclusive use of?NH4+?in?the?nutrient solution suppressed plant growth severely. The initial symptoms of ammonium toxicity appeared on the lower leaves, with?the?curling down of the old leaves. The margins turned brown and finally died.?The introduction of the two?nitrogen?forms as the treatment ratio?60:40 (NH4+:NO3?)?resulted in?theoptimal?growth performance?and nutrient uptake?of this?variety. The rate K/Ca+Mg=0.57, which was close to the best rate 0.67, allowed the optimal uptake of all nutrients. The data of?the?growth characteristics, nutrient content and electrical conductivity (EC) and pH were subjected to a polynomial regression analysis. The results show a high correlation between these data and the variation of?NH4+:NO3?ratios.?The values of the fresh and dry weight and N content of above-ground plant tissue to this variation?were?linear, with R2?coefficients of 0.95***, 0.94**, and 0.71*. The?changes in the?NO3??concentration in the petiole sap, EC and pH?of?the?root substrate?were?quadratic, with a coefficients of R2= 0.99***,?0.98***, and 0.73*.
机译：营养液中？NH4 +：NO3？比例（meq / l：？0：100、40：60、50：50、65：35和100：0）的变化对草莓（Fragaria×ananassa？var）的影响评价了Seolhyang）的生长。将珍珠岩的大粒径（2？至5mm）和小粒径（小于1mm）的混合物用作生长基质，并将营养液每周一次施用于根基质。在移植后120天确定生长反应。在所测试的处理方法中，使用NO3（作为营养液中唯一的氮源）导致了最高的营养生长。相反，在营养液中仅使用“ NH4 +”会严重抑制植物的生长。铵中毒的最初症状出现在下部叶片上，随着老叶片的卷曲而下降。边际变成棕色并最终死亡。由于两种氮素形式的引入（处理比例为60:40（NH4 +：NO3））导致了该品种的最佳生长性能和养分吸收。 K / Ca + Mg = 0.57的比率接近最佳比率0.67，可以最佳地吸收所有养分。对生长特性，养分含量，电导率（EC）和pH值的数据进行多项式回归分析。结果表明，这些数据与？NH4 +：NO3？比率的变化之间具有高度相关性。地上植物组织的鲜重和干重以及N含量的值与该变化呈线性关系，具有R2系数。 0.95 ***，0.94 **和0.71 *。根基质的叶柄汁液，EC和pH中NO3浓度的变化是二次的，系数R2 = 0.99 *** 、? 0.98 ***和0.73 *。 。

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