南方农业学报2011，Vol.42Issue(8)：890-894,5.
播期对融水、三江超级稻头季稻及再生稻性状的影响
Effect of different sowing dates on characteristics of first and ratoon super rice crops
摘要
Abstract
[Objective]The present experiment was conducted to investigate suitable sowing dates for super rice in order to regulate the growth duration of first and ratoon croppings of rice and rape. [Method ]The super rice variety Zhongzheyou 1 was used to compare the morphological and economical characteristics of first and ratoon crops for super rice sown on different sowing dates (19*, 24* and 29* March and 3rd and 8* April) in Rongshui and Sanjiang counties. [Result]The results showed that the leaf-age, basal seedlings, max seedlings and effective panicles of first cropping increased with the delay of sowing dates for 5 days, while the panicle setting rate, grains per panicle, full grains per panicle and yield were decreased. The initial heading stage, full heading stage and maturity stage of first cropping also delayed for 1-4 days and the whole growth period shortened by 1-4 days. The growth duration was also delayed in ratoon cropping and most of the characteristics worsened. Under suitable climatic conditions, the stubble of ratoon rice should be kept higher to elongate growth period for getting high yield. [ Conclusion ]The suitable sowing date for super rice planting areas with 140-250 m elevation ranged from 19-24 March and may be delayed, and the stubble height of ratoon cropping kept higher to get higher yield.关键词
超级稻/头季稻/再生稻/播期/性状Key words
super rice/ first rice crop/ ratoon cropping/ sowing stage分类
农业科技引用本文复制引用
杨日,杨桂芬,龚志宏,李前琦,韦凤舞..播期对融水、三江超级稻头季稻及再生稻性状的影响[J].南方农业学报,2011,42(8):890-894,5.基金项目
广西柳州市科技技术研究与开发计划项目(2007030703) （2007030703）
