刘惠东,李汉常,姚邦松,谭歆,张文萍.不同氧磷管理对水稻根系活力和产量的影响[J].湖南农业大学学报:自然科学版,2020,46(2):.
不同氧磷管理对水稻根系活力和产量的影响
  
DOI:
中文关键词:  水稻  施磷量  增氧灌溉  根系活力  产量指标
英文关键词:rice  phosphorus application  oxygation  root activity  yield indicators  principal component analysis
基金项目:国家自然科学基金项目(51909088);湖南省科技计划项目(2018JJ3243);湖南省教育厅重点项目(19A213、17A094);作物种质创新与资源利用重点实验室科学基金开放项目(15KFXM04)
作者单位
刘惠东,李汉常,姚邦松,谭歆,张文萍 1.湖南农业大学水利与土木工程学院湖南 长沙 4101282.湖南农业大学资源环境学院湖南 长沙 4101283.湖南农业大学作物种质创新与资源利用重点实验室湖南 长沙 410128 
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中文摘要:
      以杂交稻C两优608为材料,设置增氧(OI)、不增氧(NI)2种灌溉方式和磷肥运筹(施磷0.18、0.36、0.54 g/kg,以不施磷为对照),研究氧磷互作对水稻根系活力和产量的影响及水稻根系活力与产量的关系。结果表明:磷肥运筹造成水稻不同处理间根系活力和千粒质量差异显著,理论产量与分蘖期根系活力呈显著正相关;增氧造成不同处理间的理论产量、有效穗数、每穗粒数差异显著,当施磷量≤0.36 g/kg时,增氧条件下的理论产量、有效穗数分别比不增氧条件下的增加1.04%~23.69%、21.29%~50.03%,每穗粒数比不增氧条件下的降低11.49%~ 25.61%;不施磷时,增氧处理的水稻理论产量、有效穗数和千粒质量均最大;氧磷互作造成不同处理的理论产量、千粒质量差异显著,千粒质量与幼苗期、分蘖期根系活力呈显著负相关。可见,合理施磷或增氧能通过影响水稻各生育期的根系活力来提高产量,而氧磷互作有导致产量比单独施磷或增氧处理降低的趋势。
英文摘要:
      To investigate the effects of oxygen-phosphorus(P) management on root activity, yield of rice and their relationships, we adopted two irrigation regimes and three P management on the hybrid rice C Liangyou 608. The experimental groups were the two water regimes, non-oxygation (oxygenirrigation NI), oxygation(OI), three P managements, P1(0.18 g/kg), P2(0.36 g/kg), P3(0.54 g/kg), and the control without P application(P0). The results showed that, P fertilizer operation had a significant difference on 1 000-grain weight and root activity, and theoretical yield was significantly positive to root activity at tilling stage with P application. The oxygation had a significant difference on theoretical yield, effective grain number, and grain number per panicle. When the P application was less than 0.36 g/kg and oxygation, theoretical yield and effective grain number increased by 1.04%-23.69% and 21.29%-50.03%, respectively, grain number per panicle decreased by 11.49%-25.61%. The theoretical yield, offective grain number and 100-grain weight were maximum without P application but oxygation. The interaction between oxygation and P had a significant interaction difference on theoretical yield and 1 000-grain weight, 1 000-grain weight was significantly negative to root activity at seedling and tilling stage. Phosphorus application or oxygation can increase the yield by affecting the root activity at growth stage, compared with the treatment of phosphorus application or oxygation, the interaction of oxygen and phosphorus had the tendency to reduce the yield.
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