| 贾根良,代惠萍,孙三民,张社奇,冯佰利,任学敏,秦晓威.不同栽培模式下谷子叶片衰老的生理效应[J].干旱地区农业研究,2009,27(2):133~137 |
| 不同栽培模式下谷子叶片衰老的生理效应 |
| Physiological effects of leaf senescence of foxtail millet in different cultivation modes |
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| DOI：10.7606/j.issn.1000-7601.2009.02.24 |
| 中文关键词: 栽培模式 谷子 叶片衰老 |
| 英文关键词:cultivation mode foxtail millet leaf senescence |
| 基金项目:陕西省科技攻关项目(2007K01-15-1) |
| 作者 | 单位 | | 贾根良 | College of Sciences Northwest A＆F University,Yangling,Shaanxi 712100,China | | 代惠萍 | Tongchuan Polytechnic College,Tongchuan,Shaanxi 727031,China | | 孙三民 | Tongchuan Polytechnic College,Tongchuan,Shaanxi 727031,China | | 张社奇 | College of Sciences Northwest A＆F University,Yangling,Shaanxi 712100,China | | 冯佰利 | College of Agonomy Northwest A＆F University,Yangling,Shaanxi 712100,China | | 任学敏 | College of Agonomy Northwest A＆F University,Yangling,Shaanxi 712100,China | | 秦晓威 | College of Agonomy Northwest A＆F University,Yangling,Shaanxi 712100,China |
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| 中文摘要: |
| 为了揭示不同栽培模式下谷子叶片衰老及抗性指标的变化规律,本试验以谷丰888为试验材料,在80 kg/hm2施氮肥水平和基本苗为120~130万/hm2条件下,研究常规栽培(CK)、覆草栽培、地膜覆盖栽培3种栽培模式下灌浆期谷子顶三叶衰老与活性氧代谢特性。覆草栽培模式下,叶绿素含量显著高于常规栽培,叶片衰老速度缓慢,代谢强度降低缓慢,产量显著高于常规栽培;地膜覆盖栽培模式下,灌浆前期叶绿素含量显著高于常规栽培,叶片中超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性高于常规栽培,丙二醛(MDA)含量显著低于常规栽培,膜脂过氧化程度低;灌浆后期叶绿素含量急剧下降,叶片衰老速度加快,膜脂过氧化程度加剧。SOD、CAT参与谷子叶片衰老进程的调控,并通过协同作用来保护叶片,减少活性氧伤害,延长功能期,提高产量。 |
| 英文摘要: |
| To study the physiological effects of leaf senescence and resistant parameters of foxtail millet in different cultivation modes the experiment investigated the chlorophyll content photosynthetic rate SOD and CAT activities MDA content and soluble protein content in the leaves of foxtail millet among three cultivation modes （flat planting straw mulching plastic-film mulching） with 80 kg N／hm2 application and planting density of 120×104～130×104 plants／hm2 on leaf senescence of the foxtail millet cultivar Gufeng 888．The results indicated that leaf senescence and reactive oxygen species metabolism varied with the cultivation modes．Compared with flat farming straw mulching could increase leaf chlorophyll slow the speed of leaf aging and the extent of declining metabolism. At the early filling stage plastic-film mulching could increase leaf chlorophyll enhance SOD and CAT activities and lower the malondialdehyde （MDA） content．At the late filling stage there were a remarkable decline of leaf chlorophyll a quick leaf senescence and a marked increase of MDA. The SOD and CAT were involved in leaf senescence regulation synergistically protecting the leaves by reducing the damage from reactive oxygen species prolonging the functional period of leaves and increasing the yield and quality of foxtail millet. |
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