| Effect of the amount and time of straw mulching on growth and photosynthetic characteristics of Codonopsis pilosula |
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| DOI：10.7606/j.issn.1000-7601.2021.03.12 |
| Key Words: Chinese medicinal materials Codonopsis pilosula straw mulching photosynthetic characteristics yield |
| Author Name | Affiliation | | CUI Tongxia | Gansu Agriculture Technology College, Lanzhou, Gansu 730020, China | | LI Huaide | Gansu Agriculture Technology College, Lanzhou, Gansu 730020, China | | YAO Youxu | Gansu Agriculture Technology College, Lanzhou, Gansu 730020, China | | ZHENG Shengyue | Gansu Agriculture Technology College, Lanzhou, Gansu 730020, China | | FAN Chongxiu | Gansu Agriculture Technology College, Lanzhou, Gansu 730020, China | | HUI Heping | Gansu Agriculture Technology College, Lanzhou, Gansu 730020, China | | PAN Yuejing | Gansu Agriculture Technology College, Lanzhou, Gansu 730020, China |
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| Abstract: |
| In order to study the effect of the amount and covering time of straw mulching on agronomic characters, economic characters, photosynthetic characteristics and yield of Codonopsis pilosula, we set up two mulching time (A1 and A2) and four mulching amount(B1、B2、B3, and B4）by a two\|factor random block design, and no covering in open field and plastic film outcrop planting were used as double control. The results showed that the best time for the straw mulching was covering immediately after transplanting of C. pilosula, and the amount of mulching should be 10 500～13 500 kg·hm-2. The plant height of C. pilosula was 9.75 cm under A1B3 treatment, and root dry matter accumulation was 5.13 g and 4.82 g under A1B3 and A2B3 treatments, respectively. After straw mulching, the leaf area of C. pilosula treated with A1B4 and A2B3 increased by 80.86% and 60.28%, respectively, compared with CK1. The photosynthesis of C. pilosula under straw mulching increased by 46.83% and 12.07% compared with CK1 and CK2, respectively, and the average intercellular CO2 concentration was 32.06% lower than that of CK1. The results also showed that the yield of C. pilosula significantly increased, and the yield increased by 27.21% and 25.53% compared to CK1 and CK2, respectively. |
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