| 腐殖酸钠对紫花苜蓿根系生长及生物量的影响 |
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| 引用本文： | 张丽珍,陈伟,陈本建.腐殖酸钠对紫花苜蓿根系生长及生物量的影响[J].甘肃农业大学学报,2016(3):114-120. |
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| 作者姓名： | 张丽珍 陈伟 陈本建 |
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| 作者单位： | 1. 甘肃农业大学草业学院，草业生态系统教育部重点实验室，中-美草地畜牧业可持续发展研究中心，甘肃省草业工程实验室，甘肃 兰州 730070;2. 兰州城市学院,甘肃 兰州,730070 |
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| 基金项目： | 细毛羊饲料生产预加工(034-036213)． |
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| 摘 要： | 【目的】探索腐殖酸钠(SH)单施及其与磷肥(P)配施对紫花苜蓿根系生长的影响.【方法】采用盆栽试验,设6个SH施肥水平(SH,SH2,SH3,SH4,SH5,SH6)和2个磷肥施用水平(P1,P2),测定单株株高、单株地上及地下生物量、单株主根长、单株根表面积、单株根平均直径、单株根体积及根系活力.【结果】与对照(CK)相比,SH单施及其与P配施对紫花苜蓿主根长、根表面积、根平均直径、根体积、根系活力、地下生物量、株高及地上生物量均有显著地促进作用,且促进程度表现为SH-P1SH-P2SH;同时,紫花苜蓿地下根系性状与地上部性状呈极显著正相关(P0.01).在SH-P1处理组中,根系各形态指标、根系活力、株高及植株生物量随SH施用量的增加而增加,但当其增至一定程度(SH4或SH5)后开始呈下降趋势.综合分析可得,SH5-P1处理综合表现最好,且获得的地下生物量与地上生物量最高.【结论】试验肥效最佳的处理组合为SH5-P1,即腐殖酸钠为11.25g/盆,磷肥为3.41g/盆.
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| 关 键 词： | 紫花苜蓿 腐殖酸钠 根系 生物量 |
Effects of sodium humate on root growth and biomass of Medicago sativa |
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| Abstract: | Objective]In order to explore the effect of the single application of sodium humate (SH) and combined application with phosphorus (P)on root system of Medicago sativa.Method]Pot experi-ment was conducted to measure plant weight,aboveground and underground biomass ,main root length, root surface area,average root diameter,root volume and root activity.Result]The single application of SH and the combined application of SH-P had a significant promotion on root length,root surface area,av-erage root diameter,root volume,root activity,underground biomass,plant height and aboveground bio-mass of Medicago sativa,compared with the control (CK)and the promoting degree appeared in the de-creasing order of SH-P1 ,SH-P2 and SH.The root traits were significantly positively correlated with those of aboveground (P<0.01).Under the fertilizer combination of SH-P1 ,root morphological indexes,root ac-tivity,plant height and plant biomass increased as the increasing of SH application amount and showed a declining trend when SH rose from SH1 to SH4 or SH5 .Integrated analysis indicated that SH5-P1 treatment was the best with the highest aboveground and underground biomass.Conclusion]SH5-P1 is the optimal fertilizer combination,including sodium humate 11.25 g and phosphorus 3.41 g per pot. |
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| Keywords: | Medicago sativa sodium humate root biomass |
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