关键词: 施肥方式, 有机肥, 甘蓝, 土壤酶, 土壤养分, 品质

Abstract: Fertilization is an important factor affecting soil nutrients, soil biological characteristics and crop quality. In order to investigate the effects of cultivation methods on soil enzyme activities, soil nutrients in spring cabbage rhizosphere and cabbage quality in purple soil area of Southwest China, two types of earlymaturing and boltingresistant spring cabbage varieties were used as experimental materials using openfield cultivation experiments in Nanchong, Sichuan province. Four fertilization treatments, including 100% chemical fertilizer (CK), 70% chemical fertilizer + 30% organic fertilizer (T1), 50% chemical fertilizer + 50% organic fertilizer (T2) and 100% organic fertilizer (T3), were used to comparatively study the effect of applying organic fertilizer on enzyme activities and nutrients in rhizosphere soil of spring cabbage, and cabbage quality. The results showed that the application of organic fertilizer had obvious effects on soil enzyme activities, soil nutrient contents and cabbage quality. The activities of invertase, βglucosidase, urease, protease, acid phosphatase and catalase in rhizosphere soil of the same cabbage material showed the trend of T3>T2>T1>CK. Soil enzyme activities in treatments of T3 and T2 were significantly higher than those in CK. The contents of soil organic matter, available phosphorus and available potassium in T3 and T2 treatments were significantly higher than those in CK, and T3 had the highest values. However, there was no significant difference in the content of soil available nitrogen between different fertilization treatments. There was a significant correlation between soil enzyme activities and soil organic matter, available phosphorus, available potassium and other nutrient indicators. Under the same fertilization treatment, soil enzyme activity and soil nutrient content of different cabbage materials had no significant difference, but the quality of cabbage had significant difference. Increased the application of organic fertilizer can improve soil quality in purple soil region of southwest China, and thus could promote the improvement of comprehensive quality of spring cabbage. The present research provided a basis for the production of safe and highquality vegetable products and the development of sustainable agriculture.

Key words: fertilization method, organic fertilizer, spring cabbage, soil enzymes, soil nutrients, quality