| 引用本文： |
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聂伟燕，赵尊练，夏云飞，房清鹏，胡建超，郭长美，史联联，徐乃林，郭建伟.水分胁迫对线辣椒根系生长及产量的影响[J].大中文模板3,2014,(4):30-36. [点击复制]
- NIE Wei-yan, ZHAO Zun-lian, XIA Yun-fei, FANG Qing-peng, HU Jian-chao, GUO Chang-mei, SHI Lian-lian, XU Nai-lin, GUO Jian-wei.Effects of water stress on root growth and yield of line pepper[J].大中文模板3,2014,(4):30-36. [点击复制]
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| 摘要: |
| 以陕西省关中线辣椒产区普遍种植的两个线辣椒品种多娇和辛香8号为试材，研究水分胁迫对其根系形态发育及产量的影响。试验采用盆栽方法，设置5个水分梯度：40%～50%（T1），50%～60%(T2)，60%～70%(T3)，70%～80%(T4)，80%～90%（CK），测定其单株总根长、根体积、根表面积、根尖数、根交叉数、根分叉数、根平均直径、根冠比、
单株结果数和单株产量等。结果表明，各处理的单株总根长、根体积、根表面积、根尖数、根交叉数、根分叉数在水分胁迫的第20～40天期间，增加速率明显减小，甚至出现负增长，说明此时期是线辣椒根系对水分胁迫最敏感的时期；不同处理之间单株总根长、根体积、根表面积、根尖数、根分叉数、根交叉数表现为CK＞T4＞T3＞T2＞T1，T1、T2在整个水分胁迫期间均显著地抑制了根系的生长，T3、T4主要在第20～40天期间显著抑制了根系生长；在整个胁迫期间，各处理的根冠比和根平均直径均大于对照，说明线辣椒在水分胁迫下，其根系吸收的水分会首先用于保证根系自身生长，且胁迫处理不利于细根的生长及侧根的发生；单株结果数和单株产量随着土壤水分含量的降低而减少；辛香8号在各胁迫处理下的根系生长受抑制程度及单株减产程度均大于多娇，说明辛香8号的耐旱性弱于多娇。 |
| 关键词: 水分胁迫 线辣椒 根系生长 产量 |
| DOI： |
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| 基金项目:农业部公益性行业科研专项“干制辣椒品种优化及安全高效生产关键技术研究与示范”（200903025） |
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| Effects of water stress on root growth and yield of line pepper |
| NIE Wei-yan1, ZHAO Zun-lian1, XIA Yun-fei1, FANG Qing-peng1, HU Jian-chao1, GUO Chang-mei1, SHI Lian-lian2, XU Nai-lin2, GUO Jian-wei1 |
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| Abstract: |
| With the two varieties Duojiao and Xinxiang No.8 that were widely planted in Central Shaanxi in China as test materials, a pot experiment was conducted to study the effects of water stress on morphological development of roots and yield of line pepper. There were 5 water treatments, i.e., T1 (RWC 40%～50%), T2 (RWC 50%～60%), T3 (RWC 60%～70%), T4 (RWC 70%～80%) and CK (RWC 80%～90%). The total root length per plant, root volume, root surface area, number of root tips, number of root crosses, number of root branches, average root diameter, root/shoot ratio, fruit number and yield per plant were measured. The results showed that the growth rate of total root length, root volume, root surface area, number of root tips, number of root crosses and number of root branches per plant was decreased or even became negative during the 20th～40th days after water stress, which was thought to be the most sensitive period of pepper roots to water stress. Among the different treatments, the total root length, root volume, root surface area, number of root tips, number of root crosses and number of root branches per plant performed as: CK＞T4＞T3＞T2＞T1. T1 and T2 inhibited the growth of roots significantly during the whole period of water stress, while T3 and T4 did mainly during the 20th～40th days after water stress. During the whole period of stress, the root/shoot ratio and average root diameter under all water stress treatments were greater than that under the control. This indicated that the absorbed water was preferentially utilized to ensure the growth of roots under water stress, and the stress treatments were not conducive to the growth of fine roots and the appearance of lateral roots. The fruit number and yield per plant decreased with the reduction of soil moisture content. Under water stress treatments, the inhibition degree of root growth and the decrease rate of yield per plant in Xinxiang No.8 were larger than that in Duojiao, therefore the drought tolerance of Xinxiang No.8 was less than that of Duojiao. |
| Key words: water stress line pepper root growth yield |
