【摘要】 研究不同浓度的外源5-氨基乙酰丙酸对种绳胡萝卜生长及品质的影响，以期为5-氨基乙酰丙酸在胡萝卜上的应用提供理论依据。本研究以种绳模式播种的‘黑田5寸参’胡萝卜为试验材料，在胡萝卜生长季节向胡萝卜叶面喷施不同浓度的5-氨基乙酰丙酸(10、25、50、100 mg/L)，收获后通过测定胡萝卜的根长、根粗、根重、叶长以及叶绿素、可溶性蛋白、可溶性固形物、胡萝卜素含量等形态和生理指标来评价胡萝卜的产量和品质。结果表明，10～50 mg/L的外源5-氨基乙酰丙酸可以提高胡萝卜的株高和叶片中叶绿素的含量，与对照（不喷施5-氨基乙酰丙酸）相比，根重、根长、根粗和干物质含量分别增加73.05%、15.56%、18.75%和25.31%。此外，低浓度的外源5-氨基乙酰丙酸还提高了胡萝卜肉质直根中可溶性固形物、可溶性蛋白及胡萝卜素的含量，较高浓度的5-氨基乙酰丙酸则抑制了胡萝卜的生长，降低了胡萝卜肉质直根的品质。50 mg/L的5-氨基乙酰丙酸在促进胡萝卜生长和改善品质方面表现最好，可以为胡萝卜生产实践提供参考和借鉴。更多还原

【Abstract】 The effects of exogenous 5-aminolevulinic acid on the growth and quality of carrot under tape for direct sowing were studied in order to provide a theoretical basis for the application of 5-aminolevulinic acid on carrot. ’ Kuroda 5 Inch Ginseng ’ carrot was used as the test material, and tape for direct sowing of carrot was adopted. Different concentrations(0, 10, 25, 50, 100 mg/L) of 5-aminolevulinic acid(ALA) solution were sprayed to the leaves. After harvest, the yield and quality of carrot were evaluated by measuring the root length,root diameter, root weight, leaf length, and the content of chlorophyll, soluble protein, soluble solids and carotene. The results indicated that 10-50 mg/L ALA could increase the plant height and chlorophyll content of carrot leaves, and the root weight, root length, root diameter and dry matter content increased by 73.05%,15.56%, 18.75% and 25.31%, respectively, compared with those of control(without ALA application). In addition, relatively low concentration of ALA increased the content of soluble solids, soluble protein and carotene in the fleshy taproot of carrot, while relatively high concentration of ALA inhibited the growth of carrot and reduced the quality of the fleshy taproot. 50 mg/L ALA had the best performance in promoting the growth and quality of carrot, and the study could provide reference for carrot production practice.更多还原