草地学报

草地学报 ›› 2023, Vol. 31 ›› Issue (6): 1754-1761.DOI: 10.11733/j.issn.1007-0435.2023.06.018

• 研究论文 • 上一篇    下一篇

施氮对高丹草-扁豆套作系统产量、品质和氮素利用效率的影响

周丽1,2, 付薇1, 覃涛英1, 孟军江1, 桂永清3, 任建华4, 韩永芬1,2, 丁磊磊1   

  1. 1. 贵州省草业研究所, 贵州 贵阳 550006;
    2. 贵州金农富平生态农牧科技有限公司, 贵州 松桃 554100;
    3. 贵州松桃苗族自治县山地生态畜牧业发展中心, 贵州 松桃 554100;
    4. 贵州松桃苗族自治县科学技术服务中心, 贵州 松桃 554100
  • 收稿日期:2022-11-14 修回日期:2023-01-28 出版日期:2023-06-15 发布日期:2023-06-30
  • 通讯作者: 韩永芬,E-mail:442694189@qq.com
  • 作者简介:周 丽(1994-)，女，汉族，贵州毕节人，硕士研究生，主要从事草地生态畜牧研究，E-mail：zligz1994@163.com
  • 基金资助:
    贵州省科技计划项目(黔科合成果2021-一般041；黔科合服企2022-004)资助

Effects of Fertilizer Application on the Yield,Forage Quality and Nitrogen Use Efficiency of Sorghum bicolor×S. sudanense with Dolichos lablab Intercropping System

ZHOU Li1,2, FU Wei1, QING Tao-ying1, MENG Jun-jiang1, GUI Yong-qing3, REN Jian-hua4, HAN Yong-fen1,2, DING Lei-lei1   

  1. 1. Guizhou Institute of Prataculture, Guiyang, Guizhou Province 550006, China;
    2. Guizhou Jinnongfuping Sci & Tech Co., Ltd. of Ecological Agriculture and Animal Husbandry, Songtao, Guizhou Province 554100, China;
    3. Mountain Ecological Animal Husbandry Development Center of Songtao Miao Autonomous County of Guizhou Province, Songtao, Guizhou Province 554100, China;
    4. Science and Technology Service Center of Songtao Miao Autonomous County, Songtao, Guizhou Province 554100, China
  • Received:2022-11-14 Revised:2023-01-28 Online:2023-06-15 Published:2023-06-30

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摘要： 为探讨施氮量对高丹草-扁豆套作系统饲草产量、品质以及氮肥利用率的影响，本试验采用随机区组设计，主因素设高丹草(Sorghum bicolor×S. sudanense)/扁豆(Dolichos Lablab)套作(I)、高丹草(S)和扁豆(L)单作3种种植模式，副因素设0 kg·hm-2(N0，CK)，180 kg ·hm-2(N180)，260 kg·hm-2(N260)，340 kg·hm-2(N340)4个氮肥水平。结果表明：施氮有利于提高套作混合饲草的鲜/干产量和粗蛋白含量，与对照差异显著(P<0.05)。在N260时套作混合饲草的产量、粗蛋白含量和氮肥利用效率达到最高，且显著高于单作高丹草(P<0.05)。施氮增加了混合饲草的粗纤维、中/酸性洗涤纤维含量，但在同一施氮处理下混合饲草的粗纤维、中/酸性洗涤纤维含量显著低于单作高丹草(P<0.05)。根据隶数函数综合评价表明，施氮肥260 kg·hm-2时高丹草-扁豆套作系统混合饲草的品质最佳。

关键词: 高丹草/扁豆套作, 施氮量, 营养品质, 氮肥利用率

Abstract: In order to explore the effect of nitrogen application level on the yield,forage quality and nitrogen use efficiency of Sorghum bicolor×S. sudanense with Dolichos Lablab intercropping system,a randomized block design was adopted in the experiment. The main factors were S. bicolor × S. sudanense with D.Lablab intercropping (I),S. bicolor × S. sudanense monocropping (S) and D. Lablab monocropping (L)，and the side factors were 0 kg·hm-2 (N0,CK),180 kg·hm-2(N180),260 kg·hm-2 (N260),340 kg·hm-2(N340) of four fertilizer applications. The results show that fertilizer application was beneficial to enhance the fresh yield,hay yield and crude protein content of intercropped mixed forage,with a significant difference to those under N0 (P<0.05). Intercropping mixed forage yield,crude protein content and nitrogen use efficiency reached the highest under the N260,and were significantly higher than those of S. bicolor × S. sudanense monocropping (P<0.05). Fertilizer application increased the contents of crude fiber,neutral detergent fiber and acid detergent fiber in mixed forage;but under the same fertilizer application,the contents of crude fiber and neutral detergent fiber and acid detergent fiber in mixed forage were significantly lower than those in S. bicolor × S. sudanense monocropping (P<0.05). According to the comprehensive evaluation of membership function method,comprehensive quality of S. bicolor × S. sudanense and D. Lablab intercropping under fertilizer application of 260 kg·hm-2 was the best on the total forage nutrients harvest.

Key words: Sorghum bicolor × S. sudanense / Dolichos Lablab intercropping, Nitrogen application level, Nutritional quality, Nitrogen use efficiency

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