| 不同种植模式土壤水浸提液对胡麻的化感效应 |
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| 引用本文： | 陈军,罗影,王立光,李进京,叶春雷,罗俊杰.不同种植模式土壤水浸提液对胡麻的化感效应[J].中国土壤与肥料,2017(3):125-130. |
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| 作者姓名： | 陈军 罗影 王立光 李进京 叶春雷 罗俊杰 |
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| 作者单位： | 甘肃省农业科学院生物技术研究所,甘 肃 兰州,730070 |
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| 基金项目： | 国家胡麻产业技术体系(CARS-17-SYZ-6)，甘肃省农业科学院科技创新工程-现代农业生物技术集成与应用(2015GAAS02) |
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| 摘 要： | 采用浸提液生物测试法研究了不同种植模式土壤水浸提液对胡麻的化感效应。结果表明:1)不同处理土壤水浸提液对胡麻种子萌发有不同程度的抑制作用,高浓度处理比低浓度处理抑制作用更强,且抑制效应由大到小依次是胡麻连作胡-麦间作撂荒小麦连作,说明胡麻连作更能产生连作障碍,自毒效应明显;2)不同处理土壤水浸提液对胡麻幼苗的苗鲜重、根鲜重、根长有不同程度的抑制作用,且高浓度主要抑制苗鲜重、根鲜重和根长,低浓度主要抑制根鲜重、根长,胡麻连作和撂荒处理对幼苗生长抑制要大于胡-麦间作和小麦连作处理;3)不同处理土壤水浸提液对胡麻影响的综合效应随浸提液浓度的升高而增大,而小麦连作高浓度处理比低浓度处理抑制作用变化不明显,且综合效应由大到小依次是胡麻连作撂荒胡-麦间作小麦连作;4)不同种植模式处理土壤可以减轻胡麻连作产生的化感效应,处理顺序为小麦连作胡-麦间作胡麻连作。综上所述,胡麻连作障碍问题确实存在,合理的作物布局有利于改善由于胡麻自身化感物质积累所造成的连作障碍。
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| 关 键 词： | 土壤水浸提液 胡麻 种植模式 化感效应 |
| 收稿时间： | 2016/3/30 0:00:00 |
| 修稿时间： | 2016/7/12 0:00:00 |
Allelopathy of soil aqueous extracts from different planting patterns on oil flaxseed |
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| CHEN Jun,LUO Ying,WANG Li-guang,LI Jin-jing,YE Chun-lei,LUO Jun-jie.Allelopathy of soil aqueous extracts from different planting patterns on oil flaxseed[J].Soil and Fertilizer Sciences in China,2017(3):125-130. |
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| Authors: | CHEN Jun LUO Ying WANG Li-guang LI Jin-jing YE Chun-lei LUO Jun-jie |
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| Abstract: | Study on allelopathy of soil aqueous extracts from different planting patterns on flax were tested by the methods of bioassay.The results showed: 1)Different treatment of soil aqueous extracts had different degree's inhibition on flax seed germination,and high concentration treatment was more effective than that of low concentration treatment.Inhibition effect ranked as flax continuous cropping>flax-wheat intercropping> abandoned>wheat continuous cropping,which means that flax continuous cropping produced more continuous cropping obstacle,and the toxic effect was obvious;2)Different treatment of soil aqueous extracts had different degree's inhibition of shoot fresh weight,root fresh weight and root length on flax seedling growth,and in high concentration mainly inhibited shoot fresh weight,root fresh weight and root length,at low concentrations mainly inhibited root fresh weight and root length.The effects of flax continuous cropping and abandoned was greater than those of flax-wheat intercropping and wheat continuous cropping;3)The inhibition synthesis effect(SE)of different soil aqueous extracts increased with the rising of concentration,but the treatment of high concentration treatment was less than that of the low concentration treatment in wheat continuous cropping,and comprehensive effect from large to small in turn was flax continuous cropping>abandoned>flax-wheat intercropping>wheat continuous cropping;4)Different planting patterns of soil obviously improved allelopathic effects of flax continuous cropping,and the effect ranked as wheat continuous cropping> flax-wheat intercropping>flax continuous cropping.In summary,flax continuous cropping obstacle occurred,rational crop rotation help to improve the flax allelochemicals accumulation caused by continuous cropping obstacle. |
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| Keywords: | soil aqueous extracts flax planting patterns allelopathy |
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