夏谷田阔叶杂草密度与谷子产量损失关系的研究  

Growing Competition between Broad Leaf Weeds and Summer Season Foxtail Millet

作　　者：周汉章[1] 薄奎勇[1] 侯升林[1] 吕芃[1] 贾海燕[1] 赵宇[1] 宋银芳[1] 董立[1] 刘恩魁 王新玉[1] 

机构地区：[1]国家谷子改良中心/国家高粱改良中心河北分中心/河北省农林科学院谷子研究所/河北省杂粮研究重点实验室,河北石家庄050035 [2]武安市农牧局,河北武安056300

出　　处：《作物杂志》2013年第1期108-112,共5页Crops

基　　金：河北省科技支撑计划项目"广谱型谷田专用除草剂‘谷友’的使用技术研究与推广应用"(09250307D);农业部公益性行业科研专项"秋闲田一年生饲料作物优化栽培技术研究与示范"(20120304201)

摘　　要：为综合治理谷田杂草,探索谷田阔叶杂草对谷子的竞争规律。采用田间小区试验和非线性回归分析的方法,对主要的杂草竞争经验模型进行模拟和比较。结果表明,谷子产量损失率与阔叶杂草密度呈显著正相关,随着阔叶杂草密度的增加呈不对称S型增加的趋势;幂双曲线函数模型拟合优度(99.5%)最大,残差平方和(22.878)最小,是模拟阔叶杂草与谷子竞争关系的最优模型。预测方程式为Y=d1.179/(3.740+0.021d1.179),阔叶杂草单株最大竞争力为0.2674,群落竞争力为0.0056,谷子产量最大损失率为47.62%。研究确定了一种拟合优度高而又实用的预测模型,可为综合治理谷田以马齿苋为主的阔叶杂草提供技术支撑。The study focused on establishment of weed management in summer season foxtail millet field by exploring the pattern of growing competition between broad leaf weeds and foxtail millet. A few fitting models were simulated and compared by employing field plot experiment and nonlinear regression analysis. The results showed that the millet yield losses and weed density was highly significantly correlated. The millet yield losses increased follow- ing a S-shaped curve trend while weed density increased. Among the tested models, the power hyperbolic function model with the maximum goodness-of-fit （99.5%） and minimum sum of squared residuals （22. 878 ） was consid- ered the optimal model to simulate the competition relation between broad leaf weeds and millet. The Predicted e- quation was Y = d^l 179/（3.740 ＋ 0. 021d^1.179）. The maximum competitiveness of a single weed plant was 0. 2674 ;of a weed community was 0.0056. The maximum millet yield loss was 47.62%. This study has established a model with high goodness-of-fit and practical prediction which could theoretically provide technical support for broad leaf weed management in summer season millet field.

关 键 词：谷田 阔叶杂草 竞争 预测模型 

分 类 号：S515[农业科学—作物学]