果实膨大期茎直径微变与环境因子和果实直径增长的关系
Relationships between micro-variation of stem diameter and environmental factors as well as fruit diameter growth during fruit development period
张祎 1赵艳霞 1徐梦莹 2孙擎 1程晋昕2
作者信息
- 1. 中国气象科学研究院,北京 100081
- 2. 云南省气候中心,昆明 650000
- 折叠
摘要
探究将反映水分状况的茎直径与果实直径增长联系起来的可行性,为果实膨大期选取适宜诊断指标,调控果实生长提供科学依据.通过监测云南地区桃树和石榴树果实膨大期的茎直径微变化,分析了茎直径日最大收缩量(MDS)和日最大值(MXSD)两个指标对气象因子和土壤水分的响应,以及茎直径生长参数与果实直径日增长量(FDG)之间的关系.结果表明:两种果树的茎直径日最大值和日最小值均出现在特定时段;MDS和MXSD对气象因子的响应敏感(r2≥0.50,P＜0.001);随着土壤含水量的增加,两种果树MXSD呈极显著线性增加(r2=0.65和0.45,P＜0.001),桃树MDS呈极显著线性减少趋势(r2=0.39,P＜0.001),而石榴树MDS与其无明显线性相关关系(P＞0.05);基于MXSD计算的两种果树茎直径日增长量(SDG)与FDG之间的显著关系(r2=0.48和0.38,P＜0.001)显示,果实直径生长对环境胁迫的响应要滞后于茎直径,且当桃树SDG不低于-0.005 mm.d-1、石榴树SDG不低于-0.063 mm·d-1时,果实直径的增长趋势不会受到影响;而两种果树基于MDS的日增长量均与FDG没有明显相关性.表明两种果树的MXSD是果实膨大期较为合适的指标,环境胁迫对果实直径生长的影响可以通过MXSD随时间的变化来监测.
Abstract
We investigated the suitability of micro-variation of stem diameter as an indicator for fruit diameter growth during fruit development period.The micro-variations of stem diameter during fruit development period of peach and pomegranate trees were monitored at Yunnan Province.We analyzed the changes in maximum daily di-ameter shrinkage(MDS)and maximum daily stem diameter(MXSD),as well as their responses to meteorological factors and soil water.The relationships between stem diameter growth parameters and fruit daily growth in fruit di-ameter(FDG)were studied.Results showed that MXSD and minimum daily stem diameter(MNSD)of the two fruit trees occurred at specific times.MDS and MXSD of both fruit trees were sensitive to meteorological factors(r2≥0.50,P＜0.001).There was a positive linear relationship between MXSD and soil water for both fruit trees(r2=0.65 and 0.45,P＜0.001).The MDS of peach tree was negatively affected by soil water(r2=0.39,P＜0.001),whereas such pattern was not detected in pomegranate tree.The significant relationship between stem daily growth(SDG)and FDG of both fruit trees calculated based on MXSD(r2=0.48 and 0.38,P＜0.001)indi-cated a lag effect of environmental stress on FDG relative to that on SDG.With respect to SDG and its relationship with FDG,-0.005 mm·d-1 for peach and-0.063 mm·d-1 for pomegranate was established as a threshold value.Below such value,FDG could decrease under environmental stress.The daily increment of MDS in both trees had no relationship with FDG.Our findings suggested that MXSD is an appropriate indicator for fruit expansion stage of both peach and pomegranate trees,and that the effect of environmental stress on fruit diameter growth can be moni-tored by temporal change of MXSD during fruit development period.
关键词
果实膨大期/茎直径/气象因子/土壤水分/果实直径增长Key words
fruit development period/stem diameter/meteorological factor/soil water/fruit diameter growth引用本文复制引用
基金项目
国家重点研发计划(2019YFD1002201)
云南省科技计划(2018BC007)
云南省省部合作协议重点工程项目高原特色农业气象服务系统建设专项()
出版年
2024
国家科技期刊平台
NSTL
万方数据