菜园土壤不同施肥模式下小青菜生长和品质及其生态化学计量学特征
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国家农业科技成果转化资金项目(2009GB24910540)和江苏省科技项目(BE2009698)资助


Growth and qualities of greengrocery and its ecological stoichiometry characteristics under different fertilization
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    摘要:

    利用盆栽试验研究了不同施肥处理对小青菜生长和品质的影响,并在此基础上利用生态化学计量学方法研究了小青菜生长和品质与其生态化学计量学特征之间的相关关系。结果表明在盆栽的条件下施氮量为180 kg/hm2是小青菜生长较为合适的水平,能达到节氮保产的效果。在氮水平为180 kg/hm2下,有机无机肥配施模式1(含有氨基酸肥料)提高了小青菜地上部的生长、碳浓度、光合速率、可溶性总糖、蔗糖、游离氨基酸含量和根系鲜重,且这些指标与其地上部C/N(碳氮比)和C/P(碳磷比)之间存在显著正相关关系,而与施肥模式中C/N和C/P之间存在正相关趋势,但相关关系不显著。此外,有机无机肥配施模式1降低了小青菜的地上部硝酸盐含量,且该指标与其地上部和施肥模式中N/P(氮磷比)、C/N、C/P和P/K(磷钾比)之间均不存在相关关系。因此,有机无机肥配施模式1促进了小青菜地上部和根系生长,提高了光合速率,改善了小青菜地上部的品质,是一种科学的施肥措施。

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    The growth and qualities of greengrocery was studied under pot conditions, and the correlation between ecological stoichiometry characteristics and growth and qualities of greengrocery was also studied. These results showed that the 180 kg/hm2 nitrogen was the best fertilization for greengrocery. The growth, C content, net photosynthetic rate (Pn) , the soluble sugar, sucrose, free amino acids content and the root fresh weight in greengrocery showed an increase in the organic fertilizers plus inorganic fertilizers 1 treatment. Moreover, these indicators were significantly correlated with the ratios of C/N、C/P in the shoot of greengrocery. However, the nitrate content in greengrocery showed an decrease in the organic fertilizers plus inorganic fertilizers 1 treatment and had not the correlation with the ratio of N/P、C/N、C/P、P/K in greengrocery shoot and fertilization. These results suggested that we can improve the shoot and root growth, net photosynthetic rate and qualities of greengrocery by using the organic fertilizers plus inorganic fertilizers 1 treatment.

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袁 伟,董元华,王 辉.菜园土壤不同施肥模式下小青菜生长和品质及其生态化学计量学特征[J].土壤,2010,42(6):987-992. YUAN Wei, DONG Yuan-hua, WANG Hui. Growth and qualities of greengrocery and its ecological stoichiometry characteristics under different fertilization[J]. Soils,2010,42(6):987-992

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