一年生和多年生豆禾混播草地超产与多样性效应的比较

黎松松, 王宁欣, 郑伟, 朱亚琼, 王祥, 马军, 朱进忠

Comparison of transgressive overyielding effect and plant diversity effects of annual and perennial legume-grass mixtures

LI Song-Song, WANG Ning-Xin, ZHENG Wei, ZHU Ya-Qiong, WANG Xiang, MA Jun, ZHU Jin-Zhong

表4 物种均匀度与牧草产量的函数拟合模型

Table 4 Function fitting models between species evenness and forage yield

年份 Year 处理编号 Treatment number 拟合曲线 Fitting curve R2 p 2013 AM2 y = -1.3682x2 + 1.0218x + 1.1065 0.282 5 >0.05 PM2-A y = -1.0161x2 + 1.4789x + 0.1569 0.688 1 <0.01 PM4 y = -1.6284x2 + 1.8951x + 0.1763 0.667 3 <0.01 PM6 y = -1.3567x2 + 1.624x + 0.1476 0.601 7 <0.01 2014 AM2 y = -0.0333x + 0.7827 0.002 7 >0.05 PM2-A y = -0.6501x2+ 0.5594x + 0.2012 0.416 8 <0.05 PM4 y = -1.2421x2 + 1.2671x + 0.0981 0.777 1 <0.01 PM6 y = 0.3897x + 0.1251 0.769 9 <0.01 2015 AM2 y = -0.6322x2 + 0.8796x + 0.0887 0.782 0 <0.01 PM2-A y = -0.2212x2 + 0.1058x + 0.3687 0.307 4 <0.05 PM4 y = -1.125x3 + 1.7721x2 - 0.7338x + 0.3097 0.603 1 <0.01 PM6 y = -0.1765x2 + 0.0925x + 0.3122 0.535 4 <0.01 3年平均值 Three years average AM2 y = -0.7384x2 + 0.7472x + 0.6114 0.042 2 >0.05 PM2-A y = -0.5024x2 + 0.6473x + 0.2434 0.164 4 <0.05 PM4 y = -0.9286x2 + 1.0004x + 0.1930 0.258 7 <0.05 PM6 y = -0.5301x2 + 0.7211x + 0.1922 0.237 5 <0.05