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草业学报 ›› 2017, Vol. 26 ›› Issue (9): 45-56.DOI: 10.11686/cyxb2017099

• 研究论文 • 上一篇    下一篇

定位试验下败蔸对苎麻产量及产量构成的影响

白玉超, 王辉, 郭婷, 李林林, 杨瑞芳, 佘玮, 崔国贤*   

  1. 湖南农业大学苎麻研究所,湖南 长沙 410128
  • 收稿日期:2017-03-07 修回日期:2017-05-05 出版日期:2017-09-20 发布日期:2017-09-20
  • 通讯作者: *通信作者Corresponding author. E-mail: gx-cui@163.com
  • 作者简介:白玉超(1989-),男,内蒙古赤峰人,在读博士。E-mail: 453441449@qq.com
  • 基金资助:
    国家麻类产业技术体系土壤肥料岗位(CARS-19-E20)和国家自然科学基金项目(31471543)资助

Effect of root rot on fiber yield and yield-related traits of ramie (Boehmeria nivea)

BAI Yu-Chao, WANG Hui, GUO Ting, LI Lin-Lin, YANG Rui-Fang, SHE Wei, CUI Guo-Xian*   

  1. Ramie Research Institute of Hunan Agricultural University, Changsha 410128, China
  • Received:2017-03-07 Revised:2017-05-05 Online:2017-09-20 Published:2017-09-20

摘要: 通过连续7年定位试验,研究了败蔸对中苎1号(Zhongzhu-1)、多倍体1号(Tri-1)和湘苎3号(Xiangzhu-3)产量及产量构成因素的影响,并对原麻产量与株高、茎粗、分株数、有效株率、鲜皮厚度、鲜皮产量和鲜皮出麻率共7个主要产量构成因素进行了相关性分析、多元回归分析和通径分析。结果表明,7年定位试验下3个苎麻品种的平均败蔸率达到14.71%,原麻产量比高产期下降14.94%。随着年份增加,苎麻株高、有效株率和鲜皮出麻率呈上升趋势,线性拟合结果为株高年增长0.0181 m,有效株率年增长0.2925%,鲜皮出麻率年增长0.1792%;苎麻茎粗、分株数、鲜皮厚度、鲜皮产量和原麻产量呈下降趋势,线性拟合结果为茎粗年降低0.0089 cm,分株数年降低0.1057×104株/hm2,鲜皮厚度年降低0.001 mm,鲜皮产量年降低0.6439×103 kg/hm2,原麻产量年降低0.3634×102 kg/hm2。苎麻原麻产量与产量构成因素的相关系数大小顺序依次为:鲜皮产量(r=0.9108)、株高(r=0.4226)、鲜皮厚度(r=0.4176)、分株数(r=0.2777)、有效株率(r=0.2640)、鲜皮出麻率(r=0.1235)和茎粗(r=0.0395),其中株高、鲜皮厚度和鲜皮产量与原麻产量呈极显著正相关(P<0.01),分株数和有效株率与原麻产量呈显著正相关(P<0.05)。在苎麻产量构成因素中,鲜皮产量对原麻产量的直接通径作用最大(P=1.0446),鲜皮出麻率的直接通径作用次之(P=0.4262);株高、茎粗、鲜皮厚度、分株数和有效株率对原麻产量的直接通径作用都相对较小,但通过鲜皮产量对原麻产量有较大的间接作用。

Abstract: Ramie (Boehmeria nivea) and its products are important traditional and export commodities in China. The aim of this study was to investigate the effects of root rot on the main yield-related traits of ramie in a 7-year field experiment. We determined fiber yield and seven agronomic traits (plant height, stem diameter, ramet number, harvest ratio, fresh bark thickness, fresh bark yield, and bast fiber content). The relationships between root rot and these factors were evaluated by correlation analyses, multiple regression analyses, and path analyses. The results showed that the average root rot rate of Zhongzhu-1, Tri-1, and Xiangzhu-3 was up to 14.71% and the fiber yield decreased by 14.94% during the 7-year field experiment. The plant height, harvest ratio, and bast fiber content increased during the field study, with increases of 0.0181 m, 0.2925%, and 0.1792% per year, respectively. However, the stem diameter, ramet number, fresh bark thickness, fresh bark yield, and fiber yield decreased at 0.0089 cm, 0.1057×104 plants/ha, 0.001 mm, 0.6439×103 kg/ha, and 0.3634×102 kg/ha per year, respectively. The correlation coefficients between fiber yield and yield-related traits were as follows: fresh bark yield (r=0.9108), plant height (r=0.4226), fresh bark thickness (r=0.4176), ramet number (r=0.2777), harvest ratio (r=0.2640), bast fiber content (r=0.1235), and stem diameter (r=0.0395). There were highly significant correlations between fiber yield and plant height, fresh bark thickness, and fresh bark yield (P<0.01) and significant correlations between fiber yield and ramet number and harvest ratio (P<0.05). The path analysis indicated that fresh bark yield played the greatest role in fiber yield (P=1.0446), followed by bast fiber content (P=0.4262). The plant height, stem diameter, ramet number, harvest ratio, and fresh bark thickness indirectly affected fiber yield via their contributions to fresh bark yield.