Abstract: In order to explore the effects of soil amendments on the soil environment, quality and yield of the Baby Bok Choy, the soil amendments developed by our laboratory were used as materials, and soil pH, organic matter content and the internal and external quality of ‘Xiaobaimiao’ cabbage were studied. Four treatments were designed as follows: no soil amendments (CK), and application of the soil amendments 25 kg (B25), 50 kg (B50) and 75 kg (B75) per 667 m² of vegetable garden. The results showed that the application of soil amendments could maintain soil pH 7.0 above and improve soil acidification. The organic matter content in different soil layers decreased with the deepening of the soil layer. In the soil layer of 31–45 cm, the highest organic matter content was observed in the B25 treatment, which was 5.35 g·kg^–1, significantly higher than that in the CK group (P<0.05); soil amendments could increase the content of Vᴄ, soluble protein, and free amino acids in the Baby Bok Choy, while reducing nitrate content. Among them, under B75 treatment, the content of Vᴄ, soluble protein, and free amino acids was the highest, significantly different from the CK group (P<0.05), and the nitrate content was the lowest, 0.4713 mg·g^–1, significantly different from other treatments (P<0.05). Moderate application of soil amendments could increase the length, width, and number of leaves of the Baby Bok Choy, and improve its external quality. Under B25 and B50 treatments, the fresh weight of the Baby Bok Choy above ground increased by 79 g and 16 g compared to the CK group, respectively, with significant differences (P<0.05). The application of soil amendments can improve the yield and quality of the Baby Bok Choy, and improve the soil environment.

Key words: soil amendment, soil pH, Brassica campestris, quality

摘要： 以自研土壤改良剂为材料，按照蔬菜园每667 m²施入改良剂0 kg (CK)、25 kg(B25)、50 kg (B50)和75 kg (B75)设置四个处理，分析土壤改良剂对土壤pH、有机质含量以及‘小白苗’小白菜内在与外在品质的影响。结果表明，施用土壤改良剂能维持土壤pH 7.0以上，改善土壤酸化。不同土层的有机质含量表现为随着土层加深而降低。31～45 cm土层中，B25处理下有机质含量最高，为5.35 g·kg^–1，显著高于CK组(P＜0.05)；土壤改良剂能提高小白菜Vᴄ、可溶性蛋白和游离氨基酸含量，降低硝酸盐含量。其中B75处理下，Vᴄ、可溶性蛋白和游离氨基酸的含量均为最高，与CK组差异显著(P＜0.05)，硝酸盐含量最低，为0.4713 mg·g^–1，与其他处理差异显著(P＜0.05)。适量施用土壤改良剂能增加小白菜叶长、叶宽和叶片数，提高小白菜外在品质，B25和B50处理下，小白菜地上部鲜重相比于CK组分别增加了79 g和16 g，差异显著(P＜0.05)。使用自研的土壤改良剂能明显提高小白菜产量和品质，改善土壤环境。

关键词: 土壤改良剂, 土壤pH, 小白菜, 品质