中国水稻科学2016，Vol.30Issue(5)：493-506,14.DOI:10.16819/j.1001-7216.2016.6015
机插方式和密度对不同穗型水稻品种产量及其构成的影响
Effect of Different Mechanical Transplantation Methods and Density on Yield and Its Components of Different Panicle-typed Rice
摘要
Abstract
In order to apply suitable panicle-typed cultivar and plant density under different mechanical transplantation methods,and clarify high-yield formation characteristics of different panicle-typed rice,an experiment was conducted in Xinghua test point of Yangzhou University during 201 3 and 2014.Three panicle-typed rice including large panicle type (LPT,Yongyou 2640 and Yongyou 8),medium panicle type (MPT,Wuyunjing 24 and Ningjing 3)and small panicle type (SPT,Huaidao 5 and Huaidao 10 )were field-grown.We compared three mechanically transplanted methods including mechanically transplanted pot seedling (A),mechanically transplanted carpeted seedling in row spacing of 30 cm (B),mechanically transplanted carpeted seedling in row spacing of 25 cm (C)at different plant densities,namely plant spacing of 12 cm,14 cm and 1 6 cm (marked as 1 ,2,3)in A and plant spacing of 10 cm,1 1 .7 cm,1 3.3 cm, 14.8 cm,1 6 cm (marked as 1 ,2,3,4,5)in B and C.Yield and its formation,panicle traits were investigated.The main results were as follows:1)for mechanically transplanted pot seedling,with declining plant density,yield of LPT increased and then reduced,peaking in A2 treatment;yield of MPT and SPT reduced,peaking in A1 treatment.For mechanically transplanted carpet seedling,with reducing plant density,yield of LPT increased and then reduced in B, peaking in B4 treatment,yield of LPT increased in C,peaking in C5 treatment;yield of MPT increased and then reduced in B and C,peaking in B3 and C4 treatment,respectively;yield of SPT reduced in B,peaking in B1 treatment, yield of SPT increased and then reduced,peaking in C2 treatment.In the same plant density,yield of mechanically transplanted pot seedling was significantly higher than mechanically transplanted carpet seedling,the range of increased yield followed a tendency of LPT>MPT>SPT,with no significant difference in B and C.For B and C,in the same plant spacing,yield of LPT was higher in B than C;yield of MPT was higher in B than C in plant spacing of 10 cm,1 1 . 7 cm,1 3.3 cm,but it was opposite at plant spacing of 14.8 cm,1 6 cm;yield of SPT was higher in C than B in plant spacing of 1 1 .7 cm,1 3.3 cm,14.8 cm,1 6 cm.2)With plant density reduced,panicle number reduced and spikelet number per panicle increased in different panicle-typed rice under different mechanically transplanted methods.At the same plant density,there was no significant difference in panicle,grain filled percentage and 1000-grain weight in different mechanically transplanted methods,but spikelet number per panicle was significantly higher in A than B or C, following a trend of LPT>MPT>SPT.For B and C,number of panicle was lower in B than in C,but it was opposite in spikelet number per panicle.3 )Panicle length,grain density,grain weight per panicle,number of primary and secondary rachis branches,number of grains of primary and secondary rachis branches were increased with plant density reduced,it was opposite in the ratio of No.of primary rachis branch to No.of secondary rachis branch and ratio of No.of grains of primary rachis branch to No.of grains of secondary rachis branch.In the same plant density,panicle length,grain density,grain weight per panicle,number of primary and secondary rachis branches,number of grains of primary and secondary rachis branches in A than in B or C.Therefore,mechanically transplanted pot seedling of LPT could reduce plant density,it was beneficial to enlarge panicle type and increase total spikelet number and yield;for MPT and SPT,higher density should be adopted to increase panicle and spikelet number per panicle for high yield.For mechanically transplanted carpet seedling of LPT,B method and wider plant spacing should be applied to expand pani-cle type and acquire higher yield;for MPT,B method and medium density should be applied to coordinate panicle and spikelet number per panicle to increase total spikelet number;for SPT,C method and narrow plant spacing should be applied to increase number of panicle to achieve high yield.关键词
钵苗机插/毯苗机插/株行距/产量/产量构成/穗部性状Key words
mechanically transplanted pot seedling/mechanically transplanted carpet seedling/plant-row spacing/yield/yield components/panicle trait分类
农业科技引用本文复制引用
胡雅杰,郭保卫,钱海军,曹伟伟,邢志鹏,张洪程,戴其根,霍中洋,许轲,魏海燕..机插方式和密度对不同穗型水稻品种产量及其构成的影响[J].中国水稻科学,2016,30(5):493-506,14.基金项目
国家科技支撑计划重大项目(2011BAD16B03) （2011BAD16B03）
江苏省农业科技自主创新基金资助项目(CX[2]1003．9) （CX[2]1003．9）
江苏省科技支撑计划资助项目(BE2012301) （BE2012301）
江苏省高校优势学科建设工程资助项目 （）
江苏省研究生科研创新计划(KYLX_1353)资助项目 （KYLX_1353）
