白三叶和狗牙根种间竞争研究  

Dynamic Study on the Interspecific Competition of Trifolium repens and Cynodon dactylon Mixed Community

作　　者：韩德梁[1] 田宏[2] 何胜江[1] 王震洪[3] 杨光梅[4] 徐智明[5] 

机构地区：[1]贵州大学动物科学学院,贵州贵阳550025 [2]湖北省农业科学院畜牧兽医研究所,湖北武汉430209 [3]贵州大学生命科学学院,贵州贵阳550025 [4]江南大学生物工程学院,江苏无锡214000 [5]安徽省农业科学院畜牧兽医研究所,安徽合肥230031

出　　处：《安徽农业科学》2008年第30期13090-13092,13109,共4页Journal of Anhui Agricultural Sciences

基　　金：贵州省科技厅基金项目[黔科合J字(2006)2045号]

摘　　要：[目的]研究白三叶和狗牙根的种间竞争关系。[方法]采用替代系列试验法。按移栽比例设5个处理,通过测定草产量及其动态变化,揭示2种牧草的种间竞争力大小。[结果]结果表明,处理②和③的草产量最高,分别为5164和4956 g/m2,与其他3个处理差异极显著(P<0.01);处理⑤的草产量最低,为3263 g/m2。在2年试验中,随着刈割时间的推进,5个处理中白三叶的比例均逐渐下降,而狗牙根却相反。2005年年初,白三叶的竞争率大于狗牙根,以后随着气温升高,狗牙根的竞争力占主导地位。2006年,草地群落逐渐被狗牙根替代。[结论]5个处理中,处理②和③可获得较高的草产量,但从群落的稳定性考虑,白三叶和狗牙根不宜在高频刈割方式下混植。[ Objective] The purpose aimed to study the interspecific competition of Trifolium repens and Cynodon dactylon. [ Method] The replace series methods were used,setting five treatments at transplant proportion,the ability of forage competition was conducted by measuring the forage yield. [Result] The results indic ated that the forage yield of treatment ② and ③ （75% Trifolium repens ＋ 25% Cynodon dactylon,50% Trifolium repens ＋ 50% Cynodon dactylon ）was the maximum of 5 164 and 4956g/m^2, respehirely, which had significant different with other treatments at 0.01 level, while the forage yield of treatment ⑤ was the least （3 263 g/m^2）. The rate of Trifolium repens showed down trend at the different cutting periods in two years. On the contrary, the proportion of Cynodon dactylon increased. Competition ratio of Trifolium repens was greater than Cynodon dactylon at the first year. The competitive ability of Cynodon dactylon was the leading role with temperature rising and time prolonging. [ Conclusion] Althought the treatment ② and ③ could get the perfect forage output among the five treatments, the two forages were considerd not good in mix-sowing at more cutting, if takeing into account the stability of the community.

关 键 词：种间竞争 白三叶 狗牙根 

分 类 号：S541.2[农业科学—作物学]