核农学报2017，Vol.31Issue(8)：1594-1603,10.DOI:10.11869/j.issn.100-8551.2017.08.1594
不同抗性稗草对水稻产量及其生理特性的影响
Effects of Barnyardgrass With Different Resistance on Grain Yield of Rice and Their Physiological Characteristics
摘要
Abstract
In order to investigate the growth and development effects of susceptible and resistant barnyardgrass on rice,two barnyardgrass varieties (susceptible for T1 and resistant for T2) separately against quinclorac,penoxsulam and bispyribac-sodium,were employed under the co-culture condition with rice nanjing 9108 during the period from rice transplanting to maturity and with weed free as a CK.The results showed that resistant barnyardgrass significantly reduced tiller number,dry matter accumulation,spikelets per panicle and shorted growth period,but increased the 1 000-grain weight when compared with susceptible-herbicide barnyardgrass.After co-cultured with barnyardgrass,compared with CK,both treatments of T1 and T2 significantly reduced the grain yield of rice for by 32.5％ ～ 33.4％ and 24.8％ ～ 26.7％,respectively.The lose rate in rice grain yield of T2 was slightly lower than T1,but statistical analysis showed no significant difference was observed between T1 and T2.Furthermore,T1 and T2 substantially reduced LAI at heading stage,flag leaf photosynthetic rate,root oxidation activity,dry root biomass,contents of zeatin + zeatin riboside,activities of sucrose synthase and adenosine diphosphate glucose pyrophosphorylase in grains during grain filling stage and dry matter accumulation at maturity stage of rice as comparison with CK.Moreover,there was no significant difference as above described parameters between T1 and T2 treatments.In conclusion,all results preliminary detected the decrease in flag leaf photosynthetic rate,root oxidation activity,dry root biomass,contents of zeatin + zeatin riboside,activities of sucrose synthase and adenosine diphosphate glucose pyrophosphorylase in grains during grain filling stage and dry matter accumulation in maturity of rice might be the important reasons for rice loss when co-cultured with barnyardgrass.The above results provide a theoretical evidence for high yield cultivation of rice and integrated weed management.关键词
敏感稗草/抗除草剂稗草/水稻/产量/生理特性Key words
herbicide-susceptible barnyardgrass/herbicide-resistant barnyardgrass/rice/grain yield/physiological characteristics引用本文复制引用
张自常,谷涛,杨霞,彭琼,柏连阳,李永丰..不同抗性稗草对水稻产量及其生理特性的影响[J].核农学报,2017,31(8):1594-1603,10.基金项目
公益性行业(农业)科研专项(201303031),国家自然科学基金(31371953,31301276) （农业）
