摘要
为了探究光照条件的改变对冬小麦生长形态的影响。设置4种遮荫处理,分别达到光照强度的81.3%(L81.3)、57.9%(L57.9)、43.6%(L43.6)和27.8%(L27.8),无遮荫处理作常规对照记为CK。结果表明,对冬小麦从拔节期至成熟期长期遮荫,可造成随着光照强度的减小,冬小麦各生育期延长的情况逐渐加剧,株高在拔节期至抽穗期逐渐减小,叶面积和叶面积峰值逐渐增加,以及穗长线性减小。不同遮荫处理对最终株高没有形成较为明显的规律性。叶面积随着冬小麦生长时间的变化表现出“先增大,后减小”的规律,不同遮荫条件下,叶面积的峰值发生偏移,且峰值相对增加值和光强消减值之间的关系用指数函数拟合具有较好的相关性,遮荫在一定程度上促进了叶面积的增加,同时延缓了叶面积变黄和衰老。用Logistic函数拟合株高、Gauss函数拟合叶面积和线性拟合穗长均有较好的相关性。因此,L81.3处理对冬小麦生长形态影响较小,用拟合函数可以进行不同光照条件下各指标的预测,并且对研究冬小麦生长形态等方面的变化对产量和耗水等方面的影响。
In order to investigate the effects of light conditions on the growth morphology of winter wheat,4 shading treatments were set up,respectively reaching to 81.3%(L81.3),57.9%(L57.9),43.6%(L43.6)and 27.8%(L27.8)of light intensity,and with no shade treatment recorded as CK.The results showed that long-term shading from jointing stage to maturity stage could result in the extension of winter wheat growth stages,the decrease of plant height from jointing stage to heading stage,the increase of peak leaf area and leaf area,and the linear decrease of spike length with the decrease of light intensity.Different shading treatments have no obvious regularity for the final plant height.Leaf area showed the rule of“first increased,and then decreased”with the growth time of winter wheat.The peak value of leaf area is offset under different shading conditions,and the relationship between peak value and light intensity is better correlated with exponential function fitting.Shading promotes the increase of leaf area to a certain extent,and delays the yellowing and senescence of leaf area.Logistic function fitting plant height,Gauss function fitting leaf area and linear fitting panicle length have good correlation.Therefore,the L81.3 treatment has little effect on the growth morphology of winter wheat,and fitting function could be used to predict the various indicators under different light conditions and to study the effects of changes in growth morphology of winter wheat on yield and water consumption.
作者
石鹏兵
张建丰
李涛
申亚宾
SHI Pengbing;ZHANG Jianfeng;LI Tao;SHEN Yabin(State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area,Xi'an University of Technology, Xi'an 710048,China;Shaanxi Key Laboratory of Water Resources and Environment, Xi'an University of Technology,Xi'an 710048,China)
出处
《西安理工大学学报》
CAS
北大核心
2019年第2期242-247,共6页
Journal of Xi'an University of Technology
基金
中国科学院“西部之光”西部青年学者人才培养计划资助项目(XAB18.716AW06)
陕西省教育厅科研计划资助项目(16JS084)
关键词
冬小麦
遮荫
生长性状
winter wheat
shading
growth traits
