陕北半干旱区沟垄覆膜集水模式下糜子边际效应及生理特性

应用生态学报

陕北半干旱区沟垄覆膜集水模式下糜子边际效应及生理特性

屈洋^1,2,苏旺¹,李翠¹,高金锋¹,高小丽¹,王鹏科¹,冯佰利^1**,柴岩¹

(¹西北农林科技大学旱区作物逆境生物学国家重点实验室, 陕西杨凌 712100; ²宝鸡市农业科学研究所, 陕西岐山 722400)

出版日期:2014-03-18 发布日期:2014-03-18

Border effect and physiological characteristics of broomcorn millet under film mulching on ridge-furrow for harvesting rainwater model in the semiarid region of Northern Shaanxi, China.

QU Yang^1,2, SU Wang¹, LI Cui¹, GAO Jin-feng¹, GAO Xiao-li¹, WANG Peng-ke¹, FENG Bai-li¹, CHAI Yan^1

(¹State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling 712100, Shaanxi, China; ^2Baoji Research Institute of Agricultural Science, Qishan 722400, Shaanxi, China)

Online:2014-03-18 Published:2014-03-18

摘要/Abstract

摘要： 通过连续3年大田定位试验,研究了陕北半干旱区不同沟垄覆膜集水模式下糜子边际效应和生理特性.试验设4种不同的沟垄宽度(带型),垄∶沟分别为40 cm∶40 cm(P₄₀)、60 cm∶60 cm(P₆₀)、80 cm∶80 cm(P₈₀)、100 cm∶100 cm(P₁₀₀),对照为露地平播(NM).结果表明: 随着沟垄宽度的增大,糜子的产量边际效应指数和边际效应增大,边行的增产作用呈上升趋势,最大增产率达207.7%,而中行的增产作用呈下降趋势,增产幅度最低仅为103%.带型60 cm∶60 cm的糜子产量在3年中均为最高.同一处理内，边行对糜子产量的贡献率大于中行,差异达到显著水平.不同带型边行的叶绿素含量、Chl a/Chl b、光合速率均大于中行;沟垄宽度越大,边行的光合能力越强,中行的光合能力越弱.带型60 cm∶60 cm是陕北半干旱区糜子种植的适宜带型.

Abstract: To explore the border effect and physiological characteristic of broomcorn millet growing under different film mulching on ridge-furrow for harvesting rainwater models in the semiarid region of Northern Shaanxi, China, a three-year field experiment was conducted with four different widths of ridge and furrow, and the bare land flat sowing as the control (NM). The width of ridge and furrow varied as ridge : furrow=40 cm : 40 cm (P₄₀), 60 cm : 60 cm (P₆₀), 80 cm : 80 cm (P₈₀), and 100 cm : 100 cm (P₁₀₀). The results showed that the wider the width of furrow and ridge was, the stronger the border advantage and the border effect index of the yield were. With the increase in width of furrow and ridge, the yield increasing effect of side rows increased with the maximum of 207.7%, and the yield increasing effect of middle rows decreased with the minimum of 10.3%. P₆₀ reached the highest yield within three years. The yield contribution rate of side rows was higher than that of middle rows (P<0.05). The chlorophyll contents, Chl a/Chl b, and photosynthetic rate of side rows were higher than those of middle rows among the different harvesting rainwater models. The wider the width of furrow and ridge was, the stronger the photosynthetic capacity of side rows was, and the weaker the photosynthetic capacity of middle rows was. The optimal type of ridge and furrow was P₆₀ in the semiarid region of Northern Shaanxi.

屈洋1,2,苏旺1,李翠1,高金锋1,高小丽1,王鹏科1,冯佰利1**,柴岩1. 陕北半干旱区沟垄覆膜集水模式下糜子边际效应及生理特性[J]. 应用生态学报.

QU Yang1,2, SU Wang1, LI Cui1, GAO Jin-feng1, GAO Xiao-li1, WANG Peng-ke1, FENG Bai-li1, CHAI Yan1. Border effect and physiological characteristics of broomcorn millet under film mulching on ridge-furrow for harvesting rainwater model in the semiarid region of Northern Shaanxi, China.[J]. Chinese Journal of Applied Ecology.