根施5-氨基乙酰丙酸对早春茬日光温室黄瓜生长、产量及品质的影响

Effects of root application of 5-aminolevulinic acid on the growth, yield and quality of early spring cucumber in solar greenhouses

关键词:  黄瓜  日光温室  5-氨基乙酰丙酸  生长  产量

Key words:  cucumber  solar greenhouse  5-aminolevulinic acid  growth  yield

摘要:

为研究根施5-氨基乙酰丙酸（5-aminolevulinic acid，ALA）对早春茬日光温室黄瓜生长、产量和品质的影响，以黄瓜‘中农26号’为试验材料，采用根区滴灌方式，以1、5和10 mg/（株·次）为处理，以滴灌等量清水为对照进行试验。结果表明：与对照相比，根施1 mg/（株·次）显著提高黄瓜植株的株高、叶片数和根系活力；同时该浓度处理显著提高叶绿体色素含量、净光合速率和气孔导度，从而增加了黄瓜产量，单产比对照增加9.33%，但对果实品质（可溶性糖、维生素C、游离氨基酸和可溶性蛋白）无显著影响。在早春茬日光温室黄瓜生产过程中，根施1 mg/（株·次）可促进黄瓜生长，提高黄瓜产量。

Abstract:

To investigate the effects of root application of 5-aminolevulinic acid (ALA) on the growth,yield and quality of early spring cucumber in solar greenhouse,different concentrations of ALA,0 (control),1,5 and 10 mg/plant·time were applied to cucumber ‘Zhongnong 26’ using drip irrigation technology.The results showed that root application of ALA significantly increased the plants height,leaf numbers and root activities compared with the control,and that treatment of 1 mg/plant·time displayed the best effects.Moreover,under 1 mg/plant·time ALA treatment,the photosynthetic pigments contents (chlorophyll a and b,carotenoid),net photosynthetic rate and stomatal conductance of cucumber plant were also increased significantly.However,its intercellular carbon dioxide concentration was highly decreased,which enhanced the photosynthesis and plants yield.The yield of per ha was increased by 9.33%.There was no significant effect on fruits quality (soluble sugar,vitamin C,free amino acid and soluble protein).In conclusion,root application of 1 mg/plant·time ALA could be used for early spring cucumber cultivation in solar greenhouse.