甘农2号小黑麦在云贵高原的生产性能研究

Studies on the production performance of triticalein Yunnan-Guizhou Plateau

摘要:

以甘农2号小黑麦为试验材料,以黑麦品系C39为对照,采用二因素随机区组设计,研究了甘农2号小黑麦在云贵高原地区不同播种密度(170、260、350、440、530 万基本苗/hm2)的株高、枝条数以及草产量,并对其营养价值进行测定。结果表明:小黑麦的平均株高、枝条数和平均鲜(干)草产量均显著高于黑麦。随着播种密度增加,小黑麦和黑麦的平均枝条数表现为先增加后减少,播种密度为350 万基本苗/hm2 时平均枝条数最多。从播种密度和牧草种类交互作用分析,播种密度为530 万基本苗/hm2 时,小黑麦的鲜(干)草产量最高(37 437.5、10 482.5 kg/hm2),黑麦的鲜(干)草产量也最高(21812.5、6415.4 kg/hm2),但均与播种密度为350 万基本苗/hm2 时的鲜(干)草产量无显著差异;考虑不同播种密度的枝条数,小黑麦播种密度为350 万基本苗/hm2 时枝条数最多且草产量较高,为最经济播种密度,但要获得最高产量,则需要将播种密度增至530 万基本苗/hm2。小黑麦的粗蛋白含量(11.13%)显著高于黑麦(9.05%),NDF含量(46.64%)和ADF含量(32.95%)则显著低于黑麦(51.05%,36.81%)。

Abstract:

The optimal sowing density and production potential of the line C35 of Triticale wittmack cv.Gannong No.2 were studied by using 5 sowing densities (1.7,2.6,3.5,4.4,5.3 million basic seedling per hectare),and the rye line C39 as the control on Yunnan-Guizhou Plateau through two-factor randomized block design.And the plant height,number of branches,yield,nutritional value of triticale and rye were measured.Theresults indicated that the average plant height,number of branches and yield of triticale were significantly higherthan rye.While the sowing density was 3.5 million basic seedlings per hectare,the average number of branchesof triticale and rye was the highest.While the sowing density was 5.3 million basic seedlings per hectare,thehighest fresh weight and hay yield of triticale (37 437.5 kg/ha and 10 482.5 kg/ha) and rye (21 812.5 kg/haand 6 415.4 kg/ha) were obtained.However,the yield had no significant difference between 5.3 and 3.5 millionbasic seedlings per hectare,and the former was the most economical sowing density the latter could be for obtainingthe highest yield.The CP content of triticale (11.13%) was higher than rye (9.05%) significantly,and theNDF content (46.64%) and ADF content (32.95%) were significantly lower than rye (51.05% and 36.81%).