| 甘蔗赤斑病的严重度与产量损失的关系 |
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| 引用本文： | 冯荣扬,郭良珍.甘蔗赤斑病的严重度与产量损失的关系[J].西南农业大学学报,2000,22(4):323-326. |
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| 作者姓名： | 冯荣扬 郭良珍 |
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| 作者单位： | 湛江海洋大学农学院,广东湛江 |
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| 摘 要： | 在田间自然发病条件下，比较粤西１０个甘蔗生产品种甘蔗赤斑病的发病程度与产量损失率。结果表明：甘蔗品种疃的发病程度和产量损失均有明显差异。增施氮肥后，甘蔗赤斑病严重度增加，但对产量的增加则因品种而异。在单株测定７个甘蔗生产品种的病害严重度与产量损失的关系中获知：用来衡量病害严重度的病级与产量损失之间有十分密切的关系，从而建立了病级（ｘ）与产量损失率（ｙ）之间的回归方程：ｙ＝４．５０２９ｘ－１．５２３
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| 关 键 词： | 甘蔗 赤斑病 产量损失率 发病程度 |
| 文章编号： | 1000-2642(2000)04-0323-04 |
| 修稿时间： | 2000-03-07 |
RELATIONSHIP BETWEEN SUGARCANE YELLOW SPOT (CERCOSPORA) AND YIELD LOSS IN SUGARCANE CULTIVARS |
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| FENG Rong-yang
,GUO Iiang-zhen.RELATIONSHIP BETWEEN SUGARCANE YELLOW SPOT (CERCOSPORA) AND YIELD LOSS IN SUGARCANE CULTIVARS[J].Journal of Southwest Agricultural University,2000,22(4):323-326. |
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| Authors: | FENG Rong-yang GUO Iiang-zhen |
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| Institution: | FENG Rong-yang
,GUO Iiang-zhen
;(Agricuhuml College, Zhanjiang Ocean University, Zhanjiang, Guangdong 524088, China) |
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| Abstract: | Ten sugarcane culfvars were tested under field conditions in West Guangdong for their susceptibility to sugarcane yellow spot (Cercpoa) and the resulting yield loss (%). Conspicuous differences were noticed among the eultivars in disease severity and yield loss. Disease severity ncreased with N rate, but the inlluenee of N application on yield varied with cultivar. Analysis of 7 cultivars showed a significant correlation beween disease index and yield loss, and a regression equation was established y=4.468x-1.412, where y represents yield loss and x disease ndex. |
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| Keywords: | sugarcane yellow spot disease yield loss (%) disease severity |
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