滴头流量对棉花根系分布影响的试验
土壤湿润区与作物根系分布之间的关系是确定滴灌湿润比的理论依据,而土壤湿润区形状直接受滴头流量的控制,因此,滴头流量与作物根系分布之间的关系是确定滴灌技术参数的依据。该文以桶栽试验为基础,设置5个滴头流量处理（0.5、1、1.5、2、2.5L/h）观测了棉花5个生育阶段（苗期、蕾期、花期、铃期、吐絮期）的根系结构和根系分布。试验结果表明,小滴头流量下棉花根系分布范围窄而深,根系结构紧凑;而大滴头流量下棉花根系分布范围宽而浅,根系结构稀松。棉花根长密度随土层深度先增大后减小,并且随着滴头流量由小变大,土层内根长集中点向浅层上移。水平方向上,棉花根长密度由根轴向两边逐渐减小,而且根轴处的根长占总根长...
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| Published in | Nong ye gong cheng xue bao Vol. 25; no. 11; pp. 13 - 18 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
石河子大学水利建筑工程学院,石河子,832003
2009
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| Subjects | |
| Online Access | Get full text |
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| Abstract | 土壤湿润区与作物根系分布之间的关系是确定滴灌湿润比的理论依据,而土壤湿润区形状直接受滴头流量的控制,因此,滴头流量与作物根系分布之间的关系是确定滴灌技术参数的依据。该文以桶栽试验为基础,设置5个滴头流量处理（0.5、1、1.5、2、2.5L/h）观测了棉花5个生育阶段（苗期、蕾期、花期、铃期、吐絮期）的根系结构和根系分布。试验结果表明,小滴头流量下棉花根系分布范围窄而深,根系结构紧凑;而大滴头流量下棉花根系分布范围宽而浅,根系结构稀松。棉花根长密度随土层深度先增大后减小,并且随着滴头流量由小变大,土层内根长集中点向浅层上移。水平方向上,棉花根长密度由根轴向两边逐渐减小,而且根轴处的根长占总根长比率随滴头流量的增大而变小。试验结果为滴灌技术设计中选定土壤湿润比和滴头流量提供参考。 |
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| AbstractList | S275.6%S562; 土壤湿润区与作物根系分布之间的关系是确定滴灌湿润比的理论依据,而土壤湿润区形状直接受滴头流量的控制,因此,滴头流量与作物根系分布之间的关系是确定滴灌技术参数的依据.该文以桶栽试验为基础,设置5个滴头流量处理(0.5、1、1.5、2、2.5 L/h)观测了棉花5个生育阶段(苗期、蕾期、花期、铃期、吐絮期)的根系结构和根系分布.试验结果表明,小滴头流量下棉花根系分布范围窄而深,根系结构紧凑;而大滴头流量下棉花根系分布范围宽而浅,根系结构稀松.棉花根长密度随土层深度先增大后减小,并且随着滴头流量由小变大,土层内根长集中点向浅层上移.水平方向上,棉花根长密度由根轴向两边逐渐减小,而且根轴处的根长占总根长比率随滴头流量的增大而变小.试验结果为滴灌技术设计中选定土壤湿润比和滴头流量提供参考. 土壤湿润区与作物根系分布之间的关系是确定滴灌湿润比的理论依据,而土壤湿润区形状直接受滴头流量的控制,因此,滴头流量与作物根系分布之间的关系是确定滴灌技术参数的依据。该文以桶栽试验为基础,设置5个滴头流量处理（0.5、1、1.5、2、2.5L/h）观测了棉花5个生育阶段（苗期、蕾期、花期、铃期、吐絮期）的根系结构和根系分布。试验结果表明,小滴头流量下棉花根系分布范围窄而深,根系结构紧凑;而大滴头流量下棉花根系分布范围宽而浅,根系结构稀松。棉花根长密度随土层深度先增大后减小,并且随着滴头流量由小变大,土层内根长集中点向浅层上移。水平方向上,棉花根长密度由根轴向两边逐渐减小,而且根轴处的根长占总根长比率随滴头流量的增大而变小。试验结果为滴灌技术设计中选定土壤湿润比和滴头流量提供参考。 |
| Abstract_FL | The relationship between soil wetting pattern and crop-root distribution is the theoretical basis for choosing soil wetted percentage, and the soil wetting pattern is directly subject to the dripper discharge. Therefore, the relation between dripper discharge and crop-root distribution is the basis for determining technique parameters of drip irrigation. Based on the pot culture experiments, cotton root structure and distribution were measured in seedling stage, bud stage, flowering stage, boll stage, and boll opening stage with the dripper discharge of 0.5, 1, 1.5, 2, 2.5 L/h. The experiments results indicated that the smaller dripper discharge resulted in narrow and deep distribution of cotton root in soil and compact root structure, while the larger dripper discharge led to wide and shallow distribution of cotton root in soil and sparse root structure. Cotton root-length density increased firstly and then decreased with the increasing of soil depth, and the maximal ratio of the root length in soil laid to the total root length in soil was observed in shallow soil as a result of the dripper discharge increasing. Similarly, the cotton root-length density reduced gradually from the root axis to both sides of it, and the maximal length density of root was observed at the position of root axis in soil and was diminished by increased dripper discharge. The results provide references for the selection of soil wetted percentage and dripper discharge in the process of drip irrigation's technique design. |
| Author | 孙浩 李明思 丁浩 王允喜 崔伟敏 |
| AuthorAffiliation | 石河子大学水利建筑工程学院,石河子832003 |
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| Author_FL | Wang Yunxi Cui Weimin Li Mingsi Ding Hao Sun Hao |
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| DocumentTitleAlternate | Experiments on effect of dripper discharge on cotton-root distribution |
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| Keywords | 根系分布 滴头流量 灌溉 irrigation root length density 棉花 dripper discharge 试验 experiments cotton 根长密度 root distribution |
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| Snippet | ... S275.6%S562; 土壤湿润区与作物根系分布之间的关系是确定滴灌湿润比的理论依据,而土壤湿润区形状直接受滴头流量的控制,因此,滴头流量与作物根系分布之间的关系是确定滴灌技术参数的依据.该文以桶栽试验为基础,设置5个滴头流量处理(0.5、1、1.5、2、2.5... |
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| SubjectTerms | 根系分布 根长密度 棉花 滴头流量 灌溉 试验 |
| Title | 滴头流量对棉花根系分布影响的试验 |
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