| 摘要: |
| 以退化草地土壤为供试基质,采用盆栽和网箱栽培方法,研究大豆、黑大豆、绿豆、豌豆和蚕豆根系生长特征。结果表明:不同豆科作物根系各项指标的增长随生育期变化的时间趋势基本呈"S"型增长模型,可划分为缓增期、速增期、顶峰期和衰减期 4 个时期;不同豆科作物根系垂直分布的深浅存在较大差异,根系生物量空间呈"T"型分布,其垂直递减率符合幂曲线模型Y=B0·XB1。综合试验结果,黑大豆、蚕豆和大豆比绿豆和豌豆更适合在该试验条件下种植,其中黑大豆和蚕豆可以作为该类型土壤首选作物。本研究结果为选择适宜的豆科作物进行合理种植达到改良退化草地土壤、提高退化草地生物量产出提供了依据。 |
| 关键词: 退化草地土壤 豆科作物 根系分布 根冠生长模式 |
| DOI：10.11841/j.issn.1007-4333.2016.08.06 |
| 投稿时间：2015-11-25 |
| 基金项目:公益性行业(农业)科研专项(201503121-07);山西省自然科学基金项目(2014011031-1) |
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| Root growth characteristics of different leguminous crop in degraded grassland soil |
|
GUO Xiu-qing, DU Tian-qing, HAO Jian-ping, CUI Fu-zhu, YANG Zhen-ping
|
| (College of Agronomy, Shanxi Agricultural University, Taigu 030801, China) |
| Abstract: |
| The root-growth rhythm of different leguminous crops including soybean, black soybean, mung bean, pea, and broad bean in degraded grassland soil was studied by pot culture and rebar chain link mesh box cultivation methods.The results showed that:The root growth index of different leguminous crop followed an "S"-shaped growth model which classified as slow-increased period, rapid-increased period, peak period and decline period;Vertical distribution of roots had significant difference for all tested leguminous crops and the biomass of root system showed "T" shaped distribution model for vertical depth and root biomass followed the power curve model of decreasing successive reduction (Y=B0·XB1).According to the result of the study, it was found that black soybean, broad bean and soybean were more suitable for planting in the experimental conditions than mung bean and pea, among them, the black soybean and broad bean were preferred crops for this type of soil.This study provided a theoretical basis for the selection of suitable legume crops to improve the degraded grassland soil and increase the output of degraded grassland biomass. |
| Key words: degraded grassland soil leguminous crop root distribution growth pattern of root and shoot |
