昆山地区偏迟播小麦穗数与产量的相关性分析

Correlation Analysis on Yield Characters and Panicle Number of Slightly Late Sowing Wheat in Kunshan

在偏迟播栽培条件下,对镇麦10号等3个品种,按穗数高、中、低3个类型在小局域地段进行随机取样,调查穗数、株高、产量、每穗粒数、千粒重等性状。结果表明,3个品种都表现穗型偏小、每穗粒数较少。穗数变化对每穗粒数、千粒重变化影响相对较小。穗数与产量呈极显著正相关,在调查区间范围内,3个品种的穗数与产量符合直线回归关系。穗数与每穗粒数均呈负相关,中镇麦10号、镇麦15相关达极显著水平,扬麦16相关未达显著水平。穗数与株高呈正相关,3个品种都达极显著水平,其中扬麦16穗数达37.34万/667 m 2及以上时发生斜倒。根据结果本文提出了偏迟播小麦以足穗高产的栽培途径及必须重视的三项栽培措施。

Under the condition of slightly late sowing,three cultivars including Zhenmai No.10 were randomly sampled in a small local area according to three types of high,medium,and low panicle number.The number of panicles,plant height,yield,grains per panicle,thousand-grain weight and other characters were investigated.The analysis results indicated that the three cultivars all showed small panicle shape and fewer grains per panicle.The change of panicle number had relatively little effect on the change of grains per panicle and thousand-grain weight.The number of panicles and yield showed a very significant positive correlation.Within the survey interval,the number of panicles of the three cultivars was associated with a linear regression relationship with yield.The number of spikes and the number of grains per spike were negatively correlated.Among the three cultivars,Zhenmai 10 and Zhenmai 15 reached extremely significant levels,while Yangmai 16 did not reach a significant level.There was a positive correlation between the panicle number and the height of the plant,and all three cultivars reached a very significant level.Among them,Yangmai 16 slanted when the panicle number of 667 m 2 reached 373,400 or more.According to the results,the cultivation methods of slightly late sowing wheat to gain high yield with full ears and three cultivation measures that must be paid attention to were put forward.