离乳期水分胁迫对寒地水稻秧苗素质及产量的影响

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中图分类号：S511.051 文献标志码：A 文章编号：1673-6737（2025）04-0008-05

The Impact of Post-weaning Water Management on the Quality and Yield of Cold-region Rice Seedlings

ANG Tai-yi1 ， QIAN Yong-de1* ，CHEN Shu-qiang²，WANG Xiu-zhi1， SUI Wen-qing1，ZHANG Xiao-han1，ZHAO Ze-nan¹，ZHAO Qing-min1，WANG Yu-qil，WANG Jingl，WU Yi-meil （1 College of Agriculture，Heilongjiang Bayi Agricultural University，Daqing Heilongjiang 163oo，China; 2Rice Research Institute，Heilongjiang Academy of Agricultural Sciences，Jiamusi Heilongjiang 1540oo， China）

Abstract：Asa major riceproduction base in China， Heilongjiang Province requires precise water management during the seedlingstagetoachievebothhighyieldandsuperiorquality.UsingtheLonggeng-31cultivarasexperimentalmaterial， thisstudyimplementedthreewatermanagementtreatmentsduring theweaning stageunderdry sedling cultivation： conventional dry cultivation（CK， soil moisture 50%-60 % ），water seedling cultivation（A，maintaining 1 cm water layer），and moist seedling cultivation （B， 100% soil saturation）. The results demonstrated that seedling quality in A and B treatments wassignificantlyinferior to CK，withreductionsinleafage，seedling fulness，andseedingvigorindex by6.67 % and （204 5.07% ， 10.19% and 8.33% ，and 20.00% and 9.03% ，respectively. Moreover，CK treatment exhibited more robust root systemdevelopment.Physiologicalanalysisrevealedthatmalondialdehyde（MDA）contentinAandBtreatmentsdecreasedby （2号 27.61% and 24.38% compared to CK，while SOD，POD，and CAT enzyme activities in A treatment were 34.23% ， （20 30.88% ，and 50.57% lower than CK，respectively，indicating that dry cultivation significantly enhances seedling antioxidant capacity.Yield evaluation showed that CK treatment achieved 11.74% and 4.32% higher yieldsthan A and B treatments. Thisstudyconfirmsthatmaintainingdrycultivationconditionsduring theweaningstageeffctivelycultivatesvigorous seedlingsandincreasesyield，providingcrucialtheoreticalsupportforwater-savingandhigh-yieldricecultivationin Heilongjiang Province.

eyWords： Rice; Post-weaning period; Water management; Seedling quality；Yiel

黑龙江省位于中国东北地区，农业资源丰富，是中国主要的粮食生产基地之一[12]。（剩余6464字）