李变变,张凤华,徐接亮,赵亚光,汪灏然,张霁峰,郭梦瑶.刈割对油莎豆碳氮积累以及产量和品质的影响[J].干旱地区农业研究,2022,40(5):165~172
刈割对油莎豆碳氮积累以及产量和品质的影响
Effects of clipping on carbon and nitrogen accumulation, yield and quality of Cyperus esculentus L.
  
DOI：10.7606/j.issn.1000-7601.2022.05.18
中文关键词:  油莎豆  刈割  留茬高度  碳氮积累  产量  品质
英文关键词:Cyperus esculentus L.  clipping  stubble height  carbon and nitrogen  yield  quality
基金项目:中央引导地方专项（2060404）；新疆生产建设兵团重大计划项目（RCZK201928）
作者单位
李变变 Shihezi University, Key Laboratory of Oasis Eco\|Agriculture of Xinjiang Production and Construction Crops, Shihezi, Xinjiang 832003, China 
张凤华 Shihezi University, Key Laboratory of Oasis Eco\|Agriculture of Xinjiang Production and Construction Crops, Shihezi, Xinjiang 832003, China 
徐接亮 Shihezi University, Key Laboratory of Oasis Eco\|Agriculture of Xinjiang Production and Construction Crops, Shihezi, Xinjiang 832003, China 
赵亚光 Shihezi University, Key Laboratory of Oasis Eco\|Agriculture of Xinjiang Production and Construction Crops, Shihezi, Xinjiang 832003, China 
汪灏然 Shihezi University, Key Laboratory of Oasis Eco\|Agriculture of Xinjiang Production and Construction Crops, Shihezi, Xinjiang 832003, China 
张霁峰 Shihezi University, Key Laboratory of Oasis Eco\|Agriculture of Xinjiang Production and Construction Crops, Shihezi, Xinjiang 832003, China 
郭梦瑶 Shihezi University, Key Laboratory of Oasis Eco\|Agriculture of Xinjiang Production and Construction Crops, Shihezi, Xinjiang 832003, China 
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中文摘要:
      为明确刈割对油莎豆（Cyperus esculentus L.）地上部碳氮积累、生物量、地下部块茎产量和品质的影响，寻求适宜留茬高度，以新疆沙区油莎豆为研究对象，比较6个不同留茬高度（LC10、LC20、LC30、LC40、LC50和未刈割）下油莎豆地上部碳氮积累及产量和品质的差异。结果表明：刈割后第1天，LC50有利于叶片碳氮含量的积累，碳、氮含量分别达到 22.79%和1.65%；刈割后第5天至20天，LC10和LC20叶片碳氮含量急剧下降；刈割后第5天和第10天，LC40的全碳和全氮含量高于其他处理，分别为39.78%、38.39%和1.48%、2.12%。LC40地上部干草质量和干豆质量最大，分别为4 310.39 kg·hm-2和8 208.90 kg·hm-2，且LC40块茎淀粉、粗蛋白、粗脂肪含量以及含油量显著高于其他处理，增幅分别为38.6%、28.8%、6.0%、22.44%，此外，该留茬高度下油莎豆块茎中不饱和脂肪酸油酸含量高达74.10%，明显高于其他处理。LC10 块茎中总糖与粗灰分含量最高，分别达到44.4%和2.3%，且块茎中棕榈酸、硬脂酸、棕榈油酸、亚麻酸和亚油酸含量相对其他处理较高，分别为14.00%、2.99%、0.28%、0.42%、11.21%。综上所述，留茬高度40 cm为适宜刈割高度，利于提高新疆沙区油莎豆的产量和品质。
英文摘要:
      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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