Does root pruning increase yield and water-use efficiency of winter wheat?
文献类型：期刊论文
| 作者 | Fang, Yan1,2,3,4; Xu, Bingcheng1,2,3; Turner, Neil C.5,6; Li, Fengmin1,2,3 |
| 刊名 | Crop & pasture science
 |
| 出版日期 | 2010 |
| 卷号 | 61期号:11页码:899-910 |
| 关键词 | Chlorophyll fluorescence Grain yield Photosynthetic rate Root system size Triticum aestivum Water-use efficiency |
| ISSN号 | 1836-5795 |
| DOI | 10.1071/cp10125 |
| 通讯作者 | Li, fengmin(fmli@lzu.edu.cn) |
| 英文摘要 | A pot and a field experiment were conducted to assess whether seeding density in winter wheat affects grain yield and water-use efficiency when combined with root pruning. both experiments compared four treatments, namely (i) low (normal) plant density with no root pruning; (ii) low plant density with root pruning; (iii) high plant density (25% higher than low density) with no root pruning; and (iv) high plant density with root pruning. roots to a depth of 25 cm were cut back to keep their length to 13 cm and to limit their lateral spread to 13 cm from the plant. in the pot experiment, two water regimes were employed from stem elongation: (i) plants maintained at 85% field capacity, and (ii) plants maintained at 55% field capacity by regular watering. low rainfall in spring at the terminal stage of plant growth served as natural water stress in the field experiment. in the field, the higher plant density induced higher root biomass at all sample depths at anthesis. root pruning significantly decreased the root biomass in the upper soil layer (0-40 cm) and increased the root biomass in the deep soil layer (80-120 cm). when water was limited, increasing the seeding density by 25% reduced the grain yield, but with adequate water increasing the seeding density increased the grain yield. root pruning increased the grain yield, but there was no interaction between seeding density and root pruning on grain yield in either the pots or field. root pruning reduced water use between stem elongation and anthesis which led to more available soil water in the field between anthesis and maturity, and increased the rate of flag leaf photosynthesis at anthesis, whereas the reverse was true of increasing seeding density. measurements of chlorophyll fluorescence suggested that initially root pruning induced a stress in the plants, but that the pruned plants rapidly recovered so that by anthesis and during grain filling the level of stress was reduced. increasing the seeding density increased the number of spikes (fertile tillers), but decreased the grain yield per spike and had no effect on the thousand-kernel weight. in contrast, root pruning reduced the number of spikes in both the field and pots, but increased the grain yield per spike and thousand-kernel weight. under our experimental conditions, restricting the root size by root pruning increased the yield and water-use efficiency of winter wheat in water-limited environments. |
| WOS关键词 | SEED RATE ; CHLOROPHYLL FLUORESCENCE ; COMPETITIVE ABILITY ; WESTERN-AUSTRALIA ; PLANT-POPULATION ; SUBSOIL WATER ; WIDE-RANGE ; SOIL TYPE ; GROWTH ; DENSITY |
| WOS研究方向 | Agriculture |
| WOS类目 | Agriculture, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000283799200005 |
| 出版者 | CSIRO PUBLISHING |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2406045 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Li, Fengmin |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling Shaanxi 712100, Peoples R China 2.Minist Water Resources, Yangling Shaanxi 712100, Peoples R China 3.Lanzhou Univ, MOE Key Lab Arid & Grassland Ecol, Lanzhou 730000, Peoples R China 4.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 5.Univ Western Australia, Ctr Legumes Mediterranean Agr, Crawley, WA 6009, Australia 6.Univ Western Australia, UWA Inst Agr, Crawley, WA 6009, Australia |
| 推荐引用方式 GB/T 7714 | Fang, Yan,Xu, Bingcheng,Turner, Neil C.,et al. Does root pruning increase yield and water-use efficiency of winter wheat?[J]. Crop & pasture science,2010,61(11):899-910. |
| APA | Fang, Yan,Xu, Bingcheng,Turner, Neil C.,&Li, Fengmin.(2010).Does root pruning increase yield and water-use efficiency of winter wheat?.Crop & pasture science,61(11),899-910. |
| MLA | Fang, Yan,et al."Does root pruning increase yield and water-use efficiency of winter wheat?".Crop & pasture science 61.11(2010):899-910. |
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来源：中国科学院大学
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