留桩高度对再生稻丰两优香1号再生季生长发育、产量和品质的影响OA

To determine the suitable stubble height of hybrid rice Fengliangyou Xiang 1 planted as ratoon rice in Tianmen City of Hubei Province,this study designed seven stubble height treatments ranging from 30 to 60 cm and compared the growth period,plant height,tiller number,regeneration ability of axillary buds,yield,yield components,and grain quality among treatments.The results showed that with the increase in stubble height(ranging from 30 to 60 cm),Fengliangyou Xiang 1 generally exhibited shortened growth period and increased plant height,tiller number,and regeneration ability of axillary buds during the ratoon season.The yield was the highest(4 870.66 kg/hm2)in the treatment with 50 cm stubble height during the ratoon season.The panicle length,total grain number per panicle,andfilled grain number per panicle showed an overall decreasing trend,while the effective panicle number and seed setting rate showed an overall increasing trend during the ratoon season.The grain processing quality(brown rice rate,milled rice rate,and head rice rate)generally improved,while the grain appearance quality(chalky grain rate and chalkiness degree)generally deteriorated during the ratoon season.Considering the factors such as the yield,growth period,and grain quality,the suitable stubble height of Fengliangyou Xiang 1 was 50 cm under the experimental conditions during the ratoon season.