摘要
以春小麦“宁春4号”为供试材料,采用大田定位试验,利用可升降式紫外灯装置,观测增加不同剂量UV-B情况下春小麦的株高、绿叶数及叶部形态的变化状况。连续两年的试验结果显示,UV-B增强使春小麦植株矮化、绿叶数减少、叶角变小、单叶叶面积减小。单叶叶面积减小的原因是叶长和叶宽都有所减少。多数情况下,随着UV-B辐射增加量越多,春小麦株高和叶形态受到的影响程度越大。在中高海拔干旱半干旱地区,UV-B增强使春小麦的株型缩小、绿叶数减少,这会对春小麦的干物质积累和籽粒形成产生不利影响。
The article studied influence of enhanced ultraviolet radiation-B on plant form of spring wheat in arid and semiarid regions of middle-high elevation. Using lift lamp of UV-B, we observed plant height, green leaf number and leaf form of spring wheat＂Ningchun 4＂at different UV-B exposure dose in field condition. Field trail for two years showed that enhanced UV-B reduced plant height, green-leaf number, leaf angle, and single leaf area of spring wheat, the reason of small single leaf area was in decrease of both leaf length and leaf width. In the most conditions, enhanced ultraviolet radiation-B exposure dose is harmful for upgrowth of spring wheat. Enhanced UV-B shrink plant form and decreased green-leaf number of spring wheat in arid and semiarid regions of middle-high elevation. It is very disadvantageous for dry matter production and yield of spring wheat.
出处
《干旱地区农业研究》
CSCD
北大核心
2007年第2期80-85,共6页
Agricultural Research in the Arid Areas
基金
宁夏自然科学基金项目"地表紫外辐射增强对宁夏主要农作物生理及生态系统的影响"(A1012)
关键词
UV-B
干旱半干旱地区
中高海拔
春小麦
植株形态
Ultraviolet radiation-B
middle-high elevation
arid and semiarid regions
spring wheat
plant form
作者简介
张磊（1974-），男，宁夏永宁人，硕士，工程师，主要从事农业气象、生态学等方面的研究。
