密度与施肥对黔麦17号群体动态的影响

Effect of Density and Application on Population Trends of Qianmai 17,a New Wheat Variety

为探明密度与施肥对小麦新品种黔麦17号群体动态的影响,采用4因子二次正交旋转组合设计,对小麦新品种黔麦17号在控制密度与施肥(N,P,K)条件下的群体动态变化进行了考察,分析了不同阶段对群体发展有显著影响的栽培因子,着重对极量群体量完成天数、极限群体量、有效穗、平均单株成穗数等群体指标的形成进行了分析。结果表明:基本苗量对群体动态各项指标的影响最大,氮肥作用要大于磷肥与钾肥,肥料与基本苗的互作有一定的影响,当基本苗每增加31.2万株/hm2,达极限群体量天数缩短1.64 d,有效穗量增加12.67万穗/hm2,平均单株成穗数降低0.32穗/株。研究结果对黔麦17的精量播种有一定的参考价值。

The population trends variation of Qianmai 17 was determined under different density and application level by the quaternary quadratic orthogonal rotational combination design to study the effect of different density and application level on population trends of Qianmai 17 including analyzing the cultivation factors affecting population development at different growth stages significantly. The results showed that the basic seedling quantity had a great effect on different indexes of the population trends, the action of nitrogen was higher than phosphorus and potassium, and the interaction between application and basic seedling quantity had a certain effect on the population trends. When the basic seedling quantity increased by 312 thousand plants/hm^2, the needed days to reach the maximum population quantity was reduced by 1.64 d, the effective ear quantity increased by 126.7 thousand ears/hm^2 , the average survival ears/plant reduced by 0.32 ears/plant. The research result provide a reference to correctly calculate seed quantity in production of Qianmai 17.