小麦/玉米带田种植模式优化效应研究

在高产田条件下,研究不同小麦/玉米带幅、小麦密度、玉米密度为变化因子的种植模式对产量的影响,结果表明,不同种植模式小麦玉米带田产量有显著的差异,间作小麦带幅1.6 m时产量最高,净增长率达26.35%,而在带幅为2.66 m(5:5)带型结构中间作玉米产量最高,其增产幅度达81.15%,总产量也最高,带田增产幅度达29.29%.相关分析得出带幅与总体产量、间作玉米产量呈极显著的正相关而与间作小麦产量则呈极显著的负相关.多元回归分析表明,单位面积穗数对间作小麦产量的贡献率最大,标准化回归系数为0.597,其次为穗粒重,逐步回归分析表明,决定间作小麦产量的最终因素为带幅、单位面积穗数、玉米密度、生物产量,这4个因素决定总体变异的0.896,决定间作玉米产量的主要因素为带幅和株高.

Studies on Optimize Effects of Plant Patterns in Wheat/Maize

The effects on yields by plant patterns of intercropping were studied in high yield fields. The results indicated that the variance of yields in different plant patterns are significant. Wheat yields are highest and are more 26. 35 percent than CK when the stripe of intercropping was 1. 6 m. Corn yields were highest and more 81. 15 percent than ck and total yields of plots are also highest when the stripes of intercropping were 2. 66 m. The results of correlation analyses suggested that the stripes were significantly positive correlated with total yields and with corn yields under intercropping. Multi regression analyses showed that contribution ratio of numbers of spikes per hm2 to wheat yields under intercropping were greatest and standardization regression coefficient are 0. 597. Regression analyses showed that the eventual factors which determines wheat yields included the breadth of stripe, the numbers of the spike per hm2, corn planting densities and the outputs of biology. Four factors were 0. 896 for total variance. The main factors to determine corn yield under intercropping were the breadth of the stripes and the plant heights.