Yield Structure Analysis of Rice Neixiang 8518 under High Temperature and Drought during Booting and Filling Period
LI Hanyi
GONG Yuxiu
LI Longqing
XIANG Baoyu
LIU Jiangnan
YU Ling
LI Ru
Abstract：In order to grasp the effect of high temperature and drought on rice yield traits during booting and filling period,and optimize the measures for disaster prevention,this study investigated the yield traits(number of holes,number of spikes per hole,number of effective spikes,number of total grains in a spike,number of solid grains in a spike,fruiting rate,thousand grain mass and yield)of Neixiang 8518 in the high-yielding demonstration field of rice in Chenggu County in 2012(normal climatic),2013(normal climatic),and 2022(high temperature and drought),and analyzed the yield traits of Neixiang 8518 under normal climatic conditions and high temperature and drought conditions in terms of the mean,the highest yielding field and the lowest yielding field,and graded the yield traits of different years according to the discrepancy rate.The results showed that the average of number of holes,spikes per hole,effective spikes,number of total grains in a spike,number of solid grains in a spike,fruiting rate,thousand grain mass,and yield of Neixiang 8518 in 2012 were 160 500 holes/ha,15.9 spikes,2 550 000 spikes/ha,155.8 grains,144.8 grains,92.9%,29.9 g,and 9 400.5 kg/ha;In 2013 were 17 7 000 holes/ha,15.1 spikes,2 670 000 spikes/ha,167.1 grains,153.9 grains,92.2%,29.9 g,and 10 347.0 kg/ha.In 2022,the average number of holes of Neixiang 8518 was 160 500 holes/ha,the same as that of 2012 and lower than that of 2013;the average number of spikes per hole was 21.2 spikes,higher than that of the normal climatic year;the average effective spikes was 3 398 000 spikes/ha,higher than that of the normal climatic year;the average number of total grains in spikes was 145.0 grains,lower than that of the normal climatic year;the average number of solid grains in a spike was 93.1 grains,lower than that of the normal climatic year;the average fruiting rate was 61.2%,lower than the normal climatic year;the average thousand grain mass was 29.9 g,the same as the normal climatic year;the average yield was 7 955.3 kg/ha,lower than the normal climatic year.According to the criteria for grading the discrepancy rate,in 2022,the highest yielding field had medium number of holes,spikes per hole and effective spikes,and medium-high number of total grains in a spike,number of solid grains in a spike,fruiting rate and yield traits;the lowest yielding field had medium number of holes,spikes per hole and effective spikes,and medium-low number of total grains in a spike,number of solid grains in a spike,fruiting rate and yield traits.Neixiang 8518 high temperature and drought during booting and filling period have little impact on the number of holes,spikes per hole,effective spikes and thousand grain mass,and the larger impact on the number of total grains in a spike,the number of solid grains in a spike,the fruiting rate,resulting in a reduction in yield.To take effective measures to promote the development of spikes,can reduce the impact of high temperature and drought on yield.
Keywords：RiceNeixiang 8518Booting and filling periodHigh temperature and droughtYield structure
Publication Date：2025-06-10
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 50-56 )