YAO Li,YANG Zhongfa,WANG Lingrui.Effect of Temperature on Dry Matter Accumulation and Distribution and Absorption Capacity of Melon Roots[J].Northern Horticulture,2019,43(23):57-62.[doi:10.11937/bfyy.20191290]
温度对甜瓜根系物质积累分配及其吸收能力的影响
- Title:
- Effect of Temperature on Dry Matter Accumulation and Distribution and Absorption Capacity of Melon Roots
- Keywords:
- melon; high temperature; matter accumulation and distribution; roots
- 文献标志码:
- A
- 摘要:
- 以“激情”厚皮甜瓜为试材，设置4个处理(OU、HUP、HOP、HOU)，分析不同温度环境对厚皮甜瓜物质分配、根系生长与根系活力的影响，以期为促进厚皮甜瓜的根系生长发育、提高吸收能力和减缓海南地区厚皮甜瓜生理性萎焉问题提供参考依据。结果表明：HUP，苗期抑制植株茎粗和根径的生长，中后期促进地上部及主根生长；在厚皮甜瓜生长的各生育时期，HOP和HOU处理主侧根长、根粗、干物质积累量均降低，同化产物向地上部分的分配比例大于地下部；HOP及HOU处理伤流液量与根系活力显著低于OU及HUP处理。综上所述，高温及地上部高温会抑制厚皮甜瓜根系的干物质分配导致根系不发达；适当增加根区温度可促进根系生长发育、提高根系活力和根系吸收能力。
- Abstract:
- Taking ‘Passion’ melon as the test material,four treatments（OU,HUP,HOP,HOU） were set,the average temperature of the substrate was 40 ℃ were set up,and then the effects of different temperatures on the material distribution,root growth and root activity of melon were analyzed in order to provide a theoretical basis for promoting the root growth and absorption capacity of the melon and slowing down the physiological wilting of it in Hainan.The results showed that HUP inhibited the growth of plant stem and root width at the seedling stage,but promoted the growth of shoot and taproot in the middle and late stages.In all growth stages of melon,the taproot and lateral root length,the root width and the dry matter accumulationof HOP and HOU decreased.The distribution proportion of assimilation products to the shoot was higher than that of the root.The amount of bleeding sap and root activity of HOP and HOU were lower than those of OU and HUP.In summary,high temperature and high temperature on the shoot could inhibit the dry matter distribution of the melon roots,resulting in underdeveloped roots;proper increase of root temperature could promote root growth,root activity and root absorption capacity.
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备注/Memo
第一作者简介：姚黎（1994-），女，硕士研究生，研究方向为作物栽培。E-mail：874792656@qq.com.责任作者：杨重法（1962-），男，博士，教授，现主要从事作物栽培等研究工作。E-mail：y-hn@163.com.基金项目：海南耕地改良关键技术研究与示范专项资助项目（HNGDg1201504）。收稿日期：2019-07-10