摘要
为研究气候变暖背景下晚稻叶面积指数变化及其与产量的关系,对1999~2017年江西省南昌县晚稻生长发育和同期气象观测数据进行相关分析。结果表明:1999~2017年南昌县的年平均气温呈现上升趋势,晚稻生育期的平均气温呈现上升趋势,南昌县晚稻产量呈现上升趋势。晚稻产量和生育期平均气温呈正相关关系,随着生育期温度的升高,每增加1℃水稻产量升高424.00 kg/hm 2。历年晚稻抽穗期的LAI呈现上升的趋势,其增长率为1/10 a,抽穗期的LAI呈现上升的趋势,其增长率为0.8/10 a。晚稻抽穗期叶面积指数每升高1,产量增长210.78 kg/hm 2;乳熟期叶面积指数每升高1,产量增长218.17 kg/hm 2。晚稻抽穗期≥20℃积温呈现上升的趋势,其增长率为21.6℃·d/a。抽穗期≥20℃积温呈现下降的趋势,递减率为3.8℃·d/a。晚稻全生育期≥20℃积温呈现上升的趋势,增长率为12.4℃·d/a。生育期≥20℃积温每升高100℃·d,秧苗期叶面积指数升高1.06,晚稻拔节期叶面积指数升高0.39,抽穗期叶面积指数升高0.38,乳熟期叶面积指数下降0.83。全生育期叶面积指数升高0.23。
In order to study the change of leaf area index(LAI)of late rice and its relationship with yield under the background of climate warming,relevant analysis was performed on the growth and development of late rice and its meteorological observation data in Nanchang County,Jiangxi Province from 1999 to 2017.The results showed that the annual average temperature of Nanchang County from 1999 to 2017 showed an upward trend,the average temperature of the late rice growing period showed an upward trend,and the yield of late rice in Nanchang County showed an upward trend.There was a positive correlation between the late rice yield and the average temperature during the growing period.With the increase of the temperature during the growing period,the rice yield increased by 424 kg/hm 2 for increase of each 1℃.In the past years,the LAI at the heading stage of the rice showed an increasing trend,with a growth rate of 1/10 a,and the LAI at the heading stage showed an increasing trend,with a growth rate of 0.8/10 a.For every 1 increase in leaf area index at the heading stage of late rice,yield increased by 210.78 kg/hm 2.For every 1 increase in leaf area index at milky stage,yield increased by 218.17 kg/hm 2.The accumulated temperature at the heading stage of late rice≥20℃showed an increasing trend,and its growth rate was 21.6℃·d/a.At heading stage≥20℃,the accumulated temperature showed a downward trend,with a decreasing rate of 3.8℃·d/a.The accumulated temperature of late rice during the whole growth period≥20℃showed an increasing trend,and the growth rate was 12.4℃·d/a.For every 100℃·d increase in accumulated temperature during the growth period≥20℃,the leaf area index increased by 1.06 during the transplanting stage,and the leaf area index increased by 0.39 during the jointing stage,while the leaf area index increased by 0.38 during the heading stage.The leaf area index of milk ripening stage decreased by 0.83,and the leaf area index during the whole growth period increased by 0.23.
作者
王成孜
王尚明
张清霞
曾凯
曾越楠
胡磊
WANG Cheng-zi;WANG Shang-ming;ZHANG Qing-xia;ZENG Kai;ZENG Yue-nan;HU Lei(Jiangxi Agro-meteorological Experimental Station,Nanchang 330200,China;Meteorological Bureau in Ji’an City,Jiangxi Province,Ji’an 343000,China)
出处
《江西农业学报》
CAS
2021年第6期72-77,共6页
Acta Agriculturae Jiangxi
基金
江西省2018年中央引导地方科技发展专项(2018ZDF40024)。
