| Effects of degradation film on water consumption, cotton yield and water utilization of cotton field in extreme arid areas |
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| DOI：10.7606/j.issn.1000-7601.2021.01.06 |
| Key Words: extreme arid areas degradable mulch water consumption rule cotton yield water use efficiency |
| Author Name | Affiliation | | DING Hongwei | School of hydraulic engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-Saving Irrigation Crops, Shihezi, Xinjiang 832000, China | | WANG Zhenhua | School of hydraulic engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-Saving Irrigation Crops, Shihezi, Xinjiang 832000, China | | LI Wenhao | School of hydraulic engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-Saving Irrigation Crops, Shihezi, Xinjiang 832000, China | | ZHANG Jinzhu | School of hydraulic engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-Saving Irrigation Crops, Shihezi, Xinjiang 832000, China | | WEN Yue | School of hydraulic engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-Saving Irrigation Crops, Shihezi, Xinjiang 832000, China | | JIA Hao | School of hydraulic engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-Saving Irrigation Crops, Shihezi, Xinjiang 832000, China | | ZOU Jie | School of hydraulic engineering, Shihezi University, Shihezi, Xinjiang 832000, China |
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| Abstract: |
| To ascertain the application effect of biodegradable film forcotton in extreme arid areas, we set up four different types of biodegradable film(black oxidation\|biobidual degradation film, M1; white oxidation\|bibididization film, M2; black whole biodegradable membrane, M3; and white full biological degradation film, M4) as experimental group, compared with common plastic film (CK) to carry out the experiment,analyzed the degradation of degradable film, cotton field water consumption, plant height, stem diameter, leaf area index, dry matter accumulation, seed cotton yield, and water use efficiency, and systematically revealed the effects of degradation film on water consumption, seed cotton yield, and water use efficiency of cotton field in extremely arid areas. The results showed that M2 had the best degradation effect, at 80 d of mulching, the earliest degradation began; at 180 d of mulching, the plastic film fragments existing in M2 and M4 were ≤16 cm2; M1 and M3 degraded slowly; at the end of growth, only natural cracks ≥20 cm appeared while the common plastic mulching film had not been degraded all the time.During the growth period, the water consumption of cotton field showed a trend from increasing to decreasing, and the flower\|boll period was the highest.There was no significant difference in water consumption of cotton fields treated with various mulching films at the seedling stage, and significant difference between flower\|boll stage and boll opening stage. The water consumption of cotton fields treated with degradation film M2 was 1.93%, 1.95%, and 5.59% higher than that of degradation film M1, M3, and CK at flower\|boll stage (P<0.05), and 4.79%, 4.50%, and 6.22% higher than that of degradation film M1, M3, and CK at batting stage (P<0.05). M4 was second only to M2, and there was no significant difference.The growth difference of cotton treated with mulching film at seedling stage was small, and the difference between bud stage and flower and boll stage was large.The plant height, leaf area index, and dry matter accumulation per plant were 2.30%~15.63%, 11.59%~31.31%, and 1.84%~11.48%lower than CK, respectively.At the flower\|boll stage, the growth of cotton treated with biodegradable film M2 was the best, the stem diameter was 0.83%~15.19% higher than that of other biodegradable film and CK, the leaf area index was 1.09%~16.09% higher, and the dry matter accumulation per plant was 0.20%~13.99% higher. The seed cotton yield of degradation film M2 was 7.33%, 13.53%, and 9.50% higher than that of degradation film M1, M3, and M4, and 2.05% lower than that of CK.The water use efficiency of cotton field with degradation films M1, M2, M3, and M4 was 11.08%, 7.28%, 16.82%, and 14.56% lower than that of CK, respectively. The yield and water use efficiency of degradation films M2 was second only to CK, with no significant difference.Therefore, it is feasible to replace common plastic mulch with degradation film M2 for cotton cultivation in extremely arid regions. |
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