分层供水施磷对冬小麦生长及水分利用效率的影响
文献类型：期刊论文
| 作者 | 康利允 ; 李世清 |
| 刊名 | 中 国 农 业 科 学
 |
| 出版日期 | 2012 |
| 卷号 | 45期号:1页码:85-92 |
| 关键词 | 分层供水施磷 words: water supply and phosphorus application in different depths 冬小麦 winter wheat 根系分布 root distribution 产量 yield 水分利用效率 WUE |
| 其他题名 | Influence of Water Supply and Phosphorus Application in Different |
| 中文摘要 | 研究分层供水条件下磷对冬小麦根系分布及产量的影响。【方法】以土垫旱耕人为土为供试土壤,进行土柱试验,研究分层供水施磷对冬小麦根系分布、产量及水分利用效率的影响。试验设不施磷、施磷于0—30 cm和30—60 cm土层3种处理,每个施磷水平下设整体湿润和上干下湿(0—30 cm土层干旱胁迫,30—60cm土层湿润)两种水分处理。【结果】不同土层水磷处理显著影响冬小麦根系分布、产量及水分利用效率。上干下湿水分处理上层根系生物量较整体湿润水分处理降低19.6%,下层根系生物量增加18.8%;磷肥对根系分布的影响大于对总根系生物量的影响,施磷能明显增加施磷层次根系生物量,在上干下湿条件下,深层施磷更有利于深层根系分布。土壤水分极显著影响冬小麦产量和水分利用效率(P<0.01),与整体湿润水分处理相比,上干下湿水分处理产量和水分利用效率分别增加10.0%和47.4%;施磷显著提高产量,改善水分利用效率。不同水分条件下,施磷位置对产量和水分利用效率的影响不同,上干下湿条件下,下层施磷处理冬小麦产量及水分利用效率较上层施磷处理提高11.2%和28.6%,整体湿润条件下则相反,分别降低 |
| 英文摘要 | Experiments on effects of water supply and phosphorus application in different depths on root distribution and grain yield of winter wheat are of theoretical and practical importance to phosphorus and growth in dryland farming. 【Method】A cylindrical pot experiment was conducted with Eum-Ortllic Anthrosols (Cinnamon soils) to study the effects of water supply and phosphorus application in different depths on root distribution, grain yield and water use efficiency (WUE) of winter wheat. There were three phosphorus levels including no phosphorus (CK) and P was placed either in the topsoil at 0-30 cm (UP) or in the subsoil at 30-60 cm (LP). Water treatments were introduced to provide ample water supply with both topsoil and subsoil wet (W) and dry topsoil but ample water supply in the subsoil (D). 【Result】 The results showed that there were large difference in root distribution, yield and WUE of wheat among different treatments. Compared with W treatment, D treatment reduced 0-30 cm root biomass by 19.6%, but the 30-60 cm root biomass increased by 18.8%. The phosphorus treatments affected the distribution of roots more than total root biomass. Root biomass was increased at the site of placement where phosphorus was applied, and placement ofphosphorus at 30-60 cm increased with deep placement compared to placement at 0-30 cm under water treatment of D condition. The different water treatments significantly affected yield and WUE of wheat (P＜0.01). Phosphorus application caused higher production and WUE, increased by 10.0% and 47.4%, respectively. The placement of fertilizer P on them played different roles under two water treatments. Under D condition, placement of phosphorus at 30-60 cm produced higher yields and WUE than placement at 0-30 cm, increased by 11.2% and 28.6%; on the contrary, placement of phosphorus at 30-60 cm decreased yields and WUE by 41.1% and 37.9% under ample water supply with both topsoil and subsoil wet. 【Conclusion】 The simulated study suggested that deep placement of fertilizer phosphorus caused greater root growth, better water use efficiency and higher production under two water conditions, especially in dry topsoil but ample water supply in the subsoil . |
| 语种 | 中文 |
| 公开日期 | 2014-06-20 |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/5271]  |
| 专题 | 水土保持研究所_水保所知识产出(1956-2013) |
| 推荐引用方式 GB/T 7714 | 康利允,李世清. 分层供水施磷对冬小麦生长及水分利用效率的影响[J]. 中 国 农 业 科 学,2012,45(1):85-92. |
| APA | 康利允,&李世清.(2012).分层供水施磷对冬小麦生长及水分利用效率的影响.中 国 农 业 科 学,45(1),85-92. |
| MLA | 康利允,et al."分层供水施磷对冬小麦生长及水分利用效率的影响".中 国 农 业 科 学 45.1(2012):85-92. |
入库方式： OAI收割
来源：水土保持研究所
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