Spike-Grain Structure of Winter Wheat and Its Climate Change Tendency in Jiangsu

• 作者: Shang Shun Shang Zhaotang Zhang Xuhui
• 来源期刊: 气象与环境研究:英文版
• 学科: 地球科学
• 关键词: CLIMATE change Spike-grain structure Characteristic analysis
• 年，卷（期）: 2019,（1）
• 页码范围: 70-75
• 页数: 6页
• 分类号: P

摘要

To scientifically respond to the impact of climate change on winter wheat production, spike-grain structure data of winter wheat at Jiangsu Phenometeorological Observatory were taken as the sample. Based on agrometeorology, statistics and GIS analytical technique, status quo of spike-grain structure of winter wheat in Jiangsu and its climate change tendency were analyzed systemically. The results showed that climate change rate (CTR) of mature spike number (NS) was between -53.37 and 256.51 spikes/(m 2·10 a), and mean of whole province was 21.45 spikes/(m 2·10 a). CTR of number of grains per panicle (GNPS) was between -0.58 and 12.52 grains/(spike·10 a), and mean of whole province was 2.39 grains/(spike·10 a). CTR of thousand-grain weight (TSW) was between -1.65 and 16.39 g/(1 000 grains·10 a), and mean of whole province was 2.86 g/(1 000 grains·10 a). For the means of NS, GNPS, and TSW in whole province, they all showed the increasing trend with climate change, and they were just unbalanced among regions. Climate change induced the variation of meteorological conditions during growth period of winter wheat in Jiangsu. The variation of unity yield (UY) caused by this kind of change trend only accounted for -4.32%-17.23% of that in normal climate years, and mean of whole province was 6.4%. That is to say, comprehensive impact of meteorological condition was favorable for improving the yield of winter wheat with climate change. Therefore, coordination level of winter wheat growth and real-time meteorological conditions could be regulated by breeding the varieties with wide climate suitability, regulating sowing date and density according to local production and management level, rational fertilization and applying growth regulator, to mitigate the adverse effects of climate change on winter wheat production, and reach high yield and quality.