| Leaf nutrient diagnosis of jujube using DRIS in Aksu region |
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| DOI：10.7606/j.issn.1000-7601.2023.01.08 |
| Key Words: jujube (Huizao) leaf nutrient diagnosis DRIS Aksu region |
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| Abstract: |
| Through the collection and analysis of leaf samples from 31 mature jujube (Ziziphus jujuba Mill. cv. ‘Huizao’) orchards in Aksu, Xinjiang, the leaf nutrition diagnosis was carried out using the Diagnosis and Recommendation Integrated System (DRIS) method. This study would provide a reference for the nutritional diagnosis and balanced fertilization of mature jujube (Huizao) orchards in this area. The results showed that the nutritional diagnostic standard of DRIS index method formulated based on the measured values of N, P and K concentrations in the leaves of ‘Huizao’ collected in mid\|July had a high diagnostic accuracy. According to the statistical fertilization order of yield subpopulation, the number and frequency of the first fertilization order of nutrient elements in each subpopulation were as follows: high yield subpopulation, N—4—37.0%, P—2—18.0%, K—5—45.0%; middle yield subpopulation, N—0, P—13—92.9%, K—1—7.1%; and low yield subpopulation, N—0, P—6—85.7%, K—1—14.3%. The best ratio ranges of N, P and K concentrations in leaves of ‘Huizao’ in Aksu achieved using DRIS were N/P=11.861±2.859, N/K=1.820±0.306 and K/P=6.667±2.027, respectively. |
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