| Effects of compound water retaining agent on photosynthesis, senescence and yield of flag leaf of winter wheat in saline\|alkali land |
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| DOI：10.7606/j.issn.1000-7601.2023.02.05 |
| Key Words: winter wheat compound water retaining agent photosynthetic characteristics senescence characteristics yield saline\|alkali land |
| Author Name | Affiliation | | XU Yunshuo | Qingdao Agricultural University Dryland\|technology Key Laboratory of Shandong Province, Qingdao, Shandong 266109, China | | GAO Yu | Qingdao Agricultural University Dryland\|technology Key Laboratory of Shandong Province, Qingdao, Shandong 266109, China | | CHEN Shuang | Qingdao Agricultural University Dryland\|technology Key Laboratory of Shandong Province, Qingdao, Shandong 266109, China | | LI Wubo | Qingdao Agricultural University Dryland\|technology Key Laboratory of Shandong Province, Qingdao, Shandong 266109, China | | LI Yajun | Qingdao Agricultural University Dryland\|technology Key Laboratory of Shandong Province, Qingdao, Shandong 266109, China | | SHI Yan | Qingdao Agricultural University Dryland\|technology Key Laboratory of Shandong Province, Qingdao, Shandong 266109, China |
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| Abstract: |
| To investigate the effects of compound water\|retaining agent on photosynthesis, senescence characteristics and yield of flag leaf of winter wheat in saline\|alkali land, Jimai 44 was used as experimental material. Five different treatments were set up including no water retaining agent (CK), 15 kg·hm-2 compound water retaining agent (T1), 30 kg·hm-2 compound water retaining agent (T2), 45 kg·hm-2 compound water retaining agent (T3), and 30 kg·hm-2 attapulgite water retaining agent(T4). The results showed that the application of water retention agents promoted the growth and development of saline winter wheat and improved the photosynthesis and antioxidant enzyme activities of wheat flag leaves. T2 showed the best overall effect. Compared with CK, the aboveground dry biomass of T2 was significantly increased by 23.08%~24.90% at harvest, and the net photosynthetic rate, transpiration rate, chlorophyll content, and SOD activity of flag leaf of T2 were increased by 28.14%~29.35%, 19.22%~22.71%, 22.54%~33.47%, and 41.81%~49.52%, respectively, at 28 d after anthesis. At anthesis stage, the POD activity of T2 was significantly higher than that of CK by 31.85%~34.38%. At 14 d after anthesis, the MDA content of T2 was significantly lower than that of CK by 23.80%~25.39%. The equivalent amount of the water retention complex was more effective than that of concanavalin. T2 achieved 7 161 kg·hm-2 and 7 210 kg·hm-2 in two years, which were significantly higher than CK by 14.4% and 13.3%, respectively. The 30 kg·hm-2 of the water retention complex (T2) alleviated the adverse effects of salinity stress on photosynthesis and senescence characteristics of wheat plants, promoted wheat growth and development and improved yield. |
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