| Effects of different water and fertilizer combinations on yield of purple cabbage and soil physical and chemical properties on plateau in summer |
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| DOI：10.7606/j.issn.1000-7601.2021.03.17 |
| Key Words: coupling of water and fertilizer the lower limit of irrigation fertilization level soil nutrients purple cabbage economic output |
| Author Name | Affiliation | | GOU Zhaohui | College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730030, China | | QIN Qijie | College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730030, China | | LV Jian | College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730030, China | | CHE Xusheng | College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730030, China | | LUO Jian | College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730030, China | | ZHANG Hui | College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730030, China | | ZHANG Guobin | College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu 730030, China |
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| Abstract: |
| In order to explore the effects of different water and fertilizer conditions on the yield of purple cabbage and soil physical and chemical properties in open field of plateau in summer, and screen the appropriate water and fertilizer management system, we took the local irrigation amount and fertilization amount as the control (CK), set three lower limit of irrigation volume of soil relative water contents at 80% (W1), 60% (W2), and 40% (W3) of the field water capacity, respectively, and three fertilization levels at 100% (F1: 466.5 kg·hm-2 N, 756 kg·hm-2 P and 269.91 kg·hm-2 K), 80% (F2: 373.2 kg·hm-2 N, 604.8 kg·hm-2 P, and 215.93 kg·hm-2 K) and 60% (F3: 279.9 kg·hm-2 N, 453.6 kg·hm-2 P, and 161.95 kg·hm-2 K), a total of 10 treatments. The response of purple cabbage yield, soil nutrient accumulation, pH, EC, soil enzyme, and soil respiration to different combinations of water and fertilizer were analyzed. The results showed that: (1) the single ball weight, economic yield, biological yield, and economic coefficient of purple cabbage under the integrated water and fertilizer treatment were higher than those under the local fertilization and irrigation (CK) treatment, and the single ball weight, economic yield and economic coefficient of W2F2 treatment were significantly higher than those of CK, which increased by 16.37%, 16.37%, and 10.42%, respectively. (2) Soil sucrase activity, catalase activity, and soil respiration intensity of water and fertilizer integration treatment were higher than those of CK, among which, soil organic matter content of water and fertilizer (W2F2) treatment was significantly higher than that of CK by 26.76%. (3) At the same irrigation lower limit, soil sucrase activity, catalase activity, and soil respiration intensity were higher in medium fertilizer (F2) treatment than in high fertilizer (F1) and low fertilizer (F3) treatment, and soil organic matter content increased first and then decreased with the increase of fertilizer amount. In medium water (W2) treatment, F1 and F2 were significantly higher than that in F3 treatment, There was no significant difference between W1 and W3. (4) Under the same fertilization level, soil sucrase activity, catalase activity and soil respiration intensity were higher in W2 than in W1 and W3. Therefore, the combination of 60% field water capacity and 373.2 kg·hm-2, 604.8 kg·hm-2 and 215.93 kg·hm-2 N, P, and K (W2F2) improved yield and maintain soil physical and chemical properties on the basis of water saving and weight loss, which was the optimum combination of irrigation and fertilization for purple cabbage in the region in summer. |
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