Effects of Different Site Conditions on Alfalfa Field and Path Analysis in Arid Area of Northern Weihe River Basin

WEI Wanling; CHENG Jimin; GAO Yang; LIU Wei

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Effects of Different Site Conditions on Alfalfa Field and Path Analysis in Arid Area of Northern Weihe River Basin

- Effects of Different Site Conditions on Alfalfa Field and Path Analysis in Arid Area of Northern Weihe River Basin
- Bulletin of Soiland Water Conservation Vol. 29, Issue 5, Pages: 73-78(2010)
- 作者机构：
  
  1. 西北农林科技大学林学院, 陕西杨凌,712100
  2. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
  3. 西北农林科技大学动物科技学院, 陕西杨凌,712100
- 作者简介：
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- Published：2010
- 稿件说明：
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WEI Wanling, CHENG Jimin, GAO Yang, et al. Effects of Different Site Conditions on Alfalfa Field and Path Analysis in Arid Area of Northern Weihe River Basin[J]. Bulletin of Soiland Water Conservation, 2010, 29(5): 73-78.
DOI：

WEI Wanling, CHENG Jimin, GAO Yang, et al. Effects of Different Site Conditions on Alfalfa Field and Path Analysis in Arid Area of Northern Weihe River Basin[J]. Bulletin of Soiland Water Conservation, 2010, 29(5): 73-78. DOI：

摘要

为了提高渭北旱塬区土地利用效率和紫花苜蓿高产栽培

对渭北旱塬区阴坡(东坡)和阳坡(西坡)紫花苜蓿生长状况进行了测定研究

并选取3个紫花苜蓿的性状进行简单相关、偏相关和通径系数分析。研究结果表明

在同一坡向不同坡位上

坡下部紫花苜蓿的产量和生理性状的生长状况都优于坡上部;在同一坡位不同坡向上

阴坡紫花苜蓿的生长状况优于阳坡

其中阴坡下部的生长状况最好

阳坡上部的生长状况最差。坡向对紫花苜蓿产量的影响大于坡位的影响。株高、分枝数和单茎重的简单相关系数均为极显著

但通径系数和决策系数差别较大。株高和分枝数对产量起主要直接作用

而单茎重对生物量的直接作用不甚明显

主要是通过株高和分枝数对生物量起间接作用。

Abstract

In order to improve the efficiency of land use and achieve the high yield and benefit of alfalfa in the arid area of northern Weihe River basin

the growth status of alfalfa both on shady(east)slope and sunny(west)slope was investigated and simple correlation analysis

partial correlation analysis

and path analysis were made for selected three characters of alfalfa.Results show that in the same slope aspect but different slope positions

alfalfa yield and the growth conditions of physiological characteristics on lower slope are superior to those on uphill.In the same slope position but different aspect

the growth status of alfalfa on the shady slop is better.The best growth condition is on lower shady slope and the worst

on upper sunny slope.Effect of slope aspect on alfalfa yield is greater than slope position.The simple correlation coefficients on plant height

branch number

and single-stem weight are very significant

but the path coefficient and decision-making factors vary greatly.Plant height and branch number play a direct role in yield.The direct effect of single-stem on biomass is not significant

whereas plant height and branch number play an indirect role in biomass.

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