| 韦彩会,李伏生,许春辉,农梦玲,余江敏,罗慧.调亏灌溉及施肥对玉米干物质积累和相关生理性状的影响[J].干旱地区农业研究,2010,28(4):76~84 |
| 调亏灌溉及施肥对玉米干物质积累和相关生理性状的影响 |
| Effect of regulated deficit irrigation and fertilization on dry matter accumulation and related physiological properties of maize |
| |
| DOI：10.7606/j.issn.1000-7601.2010.04.15 |
| 中文关键词: 玉米 水分亏缺 施肥水平 复水 水分利用 干物质积累 生理性状 |
| 英文关键词:maize water deficit fertilization level rewatering water use dry matter accumulation physiological properties |
| 基金项目:国家自然科学基金(50869001)；国家973计划项目(2006CB403406) |
|
| 摘要点击次数: 207 |
| 全文下载次数: 130 |
| 中文摘要: |
| 通过盆栽试验,在2种施肥水平下,研究了拔节期和抽雄期4个水分亏缺水平,即重度亏水(SD,40%50%θf,θf为土壤田间持水量)、中度亏水(MD,50%60%θf)、轻度亏水(LD,60%70%θf)和正常灌水(CK,70%80%θf)对玉米干物质积累、水分利用和相关生理性状的效应。发现施肥有利于玉米干物质积累,拔节期和抽雄期LD均不会明显降低干物质总量或略有增加,而SD明显降低干物质总量,但水分亏缺和施肥水平对冠层水分利用效率的影响不明显。与CK相比,两个生育时期LD对叶片叶绿素(Chl)、可溶性糖(SS)、脯氨酸(Pro)和丙二醛(MDA)含量以及超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性的影响较小;SD明显降低Chl含量以及SOD、POD和CAT活性,但明显增加SS、Pro和MDA含量。LD复水后各项生理生化指标均能恢复至正常灌水水平,MD复水后能在一定程度上恢复到正常灌水水平,而SD复水后则不能。因此本试验玉米拔节期和抽雄期调亏灌溉以轻度亏水适宜。 |
| 英文摘要: |
| A pot experiment was carried out to study the effect of four water deficit levels during the jointing and tasseling stages of maize crop, i.e. serious water deficit(SD 40% ~ 50% θf, θf is field water capacity), medium water deficit( MD, 50% ~ 60% θf), mild water deficit(LD, 60% ~ 70% θf) and normal irrigation(CK, 70% ~ 80%θf) on dry matter accumulation, water use and related physiological properties of maize under two fertilization levels. Fertiliza-tion was benefcial for dry matter accumulation of maize, LD treatment did not decrease or slightly increased total dry matter of maize , but SD treatment decreased total dry matter sigmnificantly at the jointing and tasseling stages, and any Water deficit and fertilization level had no significant effect on canopy water use efficiency. Compared to CK, LD treatment had insignificant effect on leaf chlorophyl(Chl) , soluble sugar(SS) , proline(Pro) and malondialdehyde(MDA) contents, and superoxide dismutase(SOD), peroxidase(POD) and catalase(CAT) activities during the two growth stages . However, SD treatment declined the Chl content and SOD, POD and CAT activities greatly, but increased ss, Pro and MDA contents significantly. Rewatering can recover the physiological and biochemical indices to the levels of CK after suffering the LD treatment and the levels of CK to some extent after suffering the MD treatment, but it cannot recover them to the levels of CK after suffering the SD treatment. Thus mild water deficit during the jointing and tasseling stages is suitable
for the regulated deficit irrigation of maize crop in this experiment. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| | |