棉花工厂化育苗无土移栽密度对农艺性状的影响

[目的]研究棉花工厂化育苗无土移栽的适宜密度。[方法]以豫杂35为试材,采用随机区组设计,设6个移栽密度:10 500、15 000、19 500、24 000、28 500和31 500株/hm2,3次重复,研究移栽密度对株高、絮铃、成铃、幼铃数量及产量的影响。[结果]移栽密度与絮铃数呈正相关(R=0.908),与成铃数、幼铃数和株高呈负相关,相关系数分别为-0.865、-0.909和-0.895。密度为10 500~31 500株/hm2时,絮铃占总铃数的比重由14.7%增加到23.4%,而成铃比重在61.2%~68.6%、幼铃比重在15.5%~17.0%。6个密度间株高存在显著、棉花产量存在极显著差异,24 000株/hm2时产量最高,当密度低于15 000株/hm2时,产量会明显降低。株高与产量的相关性较低(R=-0.696)。[结论]为棉花工厂化育苗无土移栽技术的推广应用提供了参考。

Effects of Transplanting Density of Industrial Seedling without Soil on Cotton Agronomic Characters

[Objective] The study was to study the suitable transplanting density of the industrial cotton seedlings without soil.[Method] In the field test with randomized block design and 3 repeats,with Yuza 35 as tested materials,6 transplanting densities such as 10 500,15 000,19 500,24 000,28 500 and 31 500 plants /hm2 were set up to study the effects of transplanting density on plant height,quantity of open bolls,formed bolls,young bolls and yields.[Result]The transplanting density had positive correlation with the number of open bolls(R=0.908),and had negative correlation with the number of formed bolls,young bolls and plant height and their correlation coefficient were-0.865,-0.909 and-0.895 resp.When the density was 10 500-31 500 plants/ hm2,the proportion of open bolls in total bolls was increased from 14.7% to 23.4%,and that of formed bolls was between 61.2%-68.6%,and young bolls was between 15.5%-17.0%.The plant height had significant difference and the cotton yields had obvious difference among 6 density treatments.The cotton yield was the highest when the density was 24 000 plants/ hm2.But when the density was lower than 15 000 plants/ hm2,the cotton yields would decrease obviously.The correlation between plant height and yields was lower(R =-0.696).[Conclusion] The study provided the reference for the popularization and application of the technology of cotton transplanting without soil for industrial seedlings