| Effects of clipping on carbon and nitrogen accumulation, yield and quality of Cyperus esculentus L. |
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| DOI：10.7606/j.issn.1000-7601.2022.05.18 |
| Key Words: Cyperus esculentus L. clipping stubble height carbon and nitrogen yield quality |
| Author Name | Affiliation | | LI Bianbian | Shihezi University, Key Laboratory of Oasis Eco\|Agriculture of Xinjiang Production and Construction Crops, Shihezi, Xinjiang 832003, China | | ZHANG Fenghua | Shihezi University, Key Laboratory of Oasis Eco\|Agriculture of Xinjiang Production and Construction Crops, Shihezi, Xinjiang 832003, China | | XU Jieliang | Shihezi University, Key Laboratory of Oasis Eco\|Agriculture of Xinjiang Production and Construction Crops, Shihezi, Xinjiang 832003, China | | ZHAO Yaguang | Shihezi University, Key Laboratory of Oasis Eco\|Agriculture of Xinjiang Production and Construction Crops, Shihezi, Xinjiang 832003, China | | WANG Haoran | Shihezi University, Key Laboratory of Oasis Eco\|Agriculture of Xinjiang Production and Construction Crops, Shihezi, Xinjiang 832003, China | | ZHANG Jifeng | Shihezi University, Key Laboratory of Oasis Eco\|Agriculture of Xinjiang Production and Construction Crops, Shihezi, Xinjiang 832003, China | | GUO Mengyao | Shihezi University, Key Laboratory of Oasis Eco\|Agriculture of Xinjiang Production and Construction Crops, Shihezi, Xinjiang 832003, China |
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| Abstract: |
| To clarify the effects of clipping on aboveground carbon and nitrogen accumulation and biomass and underground tuber yield and quality of Cyperus esculentus L. , and further seek a suitable stubble height, in this study, we compared the carbon and nitrogen accumulation, yield, and quality of Cyperus esculentus L. with different stubble heights (10 cm, 20 cm, 30 cm, 40 cm, 50 cm and uncut) in the sandy area of Xinjiang. The results showed that LC50 promoted the accumulation of carbon and nitrogen content in leaves on the first day after clipping, the carbon and nitrogen contents were 22.79% and 1.65%, respectively. From day 5 to 20 after clipping, the carbon and nitrogen contents of LC10 and LC20 decreased sharply. On the 5th and 10th days after clipping, the total carbon and nitrogen contents of LC40 was higher than other treatments, which were 39.78%, 38.39% and 1.48%, 2.12%, respectively. The hay weight and tuber yield of LC40 were the largest, which were 4 310.39 kg·hm-2 and 8 208.90 kg·hm-2 respectively, and the starch, crude protein, crude fat, and oil contents of LC40 in tubers were significantly higher than other treatments, which were 38.6%, 28.8%, 6.0% and 22.44% respectively. In addition, the unsaturated fatty acid oleic acid content of LC40 in tubers was as high as 74.10%, which was significantly higher than other treatments. The total sugar and crude ash contents of LC10 in tubers were significantly higher than other treatments (P<0.05), reaching 44.4% and 2.3%, respectively. The palmitic acid, stearic acid, arachidic acid, palmitoleic acid, linolenic acid, and linoleic acid contents of LC10 in tubers were higher than other treatments, which were 14.00%, 2.99%, 0.28%,0.42% and 11.21%, respectively. In summary, the 40 cm stubble was a suitable clipping height, which was beneficial to improving the yield and quality of the local Cyperus esculentus L. . |
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