【作者】 翟桂玉； 姜慧新； 刘信宝； 沈益新；

【Author】 ZHAI Gui-yu~(1,2),JIANG Hui-xin~(1,2),LIU Xin-bao~1,SHEN Yi-xin~(1*) (1 College of Animal Science and Technology,Nanjing Agricultural University,Nanjing 210095,Jiangsu Province,P.R. China;2 Shandong Provincial Animal Husbandry and Veterinary General Station,Jinan 250022,Shandong Province,P.R. China)

【机构】 南京农业大学动物科技学院； 山东省畜牧兽医总站；

【摘要】 苏丹草(Sorghum sudanense)与野生大豆(Glysine soja)间作能提高单位土地面积上的饲草产量,但其间作优势的大小受间作配置方式和间作苏丹草播种量大小的影响。本试验通过田间试验研究了间作配置和苏丹草播种量对苏丹草+野生大豆间作的饲草产量和饲草粗蛋白产量及其土地当量比等的影响。试验结果表明,不同间作配置对苏丹草、野生大豆以及间作的混合饲草的干物质产量均有显著影响,表现为1行+1行>2行+2行>4行+4行;不同间作配置下,混合饲草干物质产量的土地当量比(LER)为1.02—1.19,粗蛋白产量的LER为1.05-1.32,表明苏丹草与野生大豆间作有明显的生产优势。苏丹草与野生大豆间作种植时,苏丹草播种量增加,苏丹草干物质产量、混合饲草干物质产量以及饲草干物质产量的LER均相应提高,但野生大豆的干物质产量和干物质产量的LER则降低。苏丹草播种量增加,还可以提高间作苏丹草、野生大豆和混合饲草的CP含量和CP产量的LER。更多还原

【Abstract】 Intercropping Sudangrass(Sorghum sudanense) with wild soybean(Glysine soja) may increase the forage yield, but the advantages of intercrop was dependent on the intercropping configuration and the sowing rate of sudangrass.The objectives of this study were to determine(i) intercropping configuration and(ii) sowing rate of sudangrass effects on forage yield,crude protein(CP) concentration and land equivalent ratio(LER) of sudangrass-wild soybean intercropping system.A 2-year sudangrass-wild soybean intercropping trial was conducted with 3 intercropping configurations(1+1 row,2+2 rows and 4+4 rows) and 3 sudangrass sowing rates.The results were as follows. Dry matter(DM) yields of sudangrass-wild soybean forage was significantly higher than that of sudangrass or wild soybean pure planting.The LER of sudangrass-wild soybean forage ranged from 1.02 to 1.19 on DM yield basis and from 1.05 to 1.32 on CP yield basis.Productivity advantage was showed in sudangrass-wild soybean intercropping.However, growth advantage of sudangrass was greater than wild soybean in intercropping.The LER of sudangrass in intercropping ranged from 0.54 to 0.66 on DM yield basis and from 0.55 to 0.82 on CP yield basis, while LER of wild soybean ranged from 0.48 to 0.53 on DM yield basis and from 0.36 to 0.49 on CP yield basis. Sudangrass-wild soybean forage yield and growth advantage were significantly affected by intercropping configuration. Sudangrass-wild soybean forage yield was 1+1row>2+2rows>4+4rows.Moreover,The DM yield and LER on DM yield basis of sudangrass and sudangrass-wild soybean forage yield were increased with sowing rate of sudangrass increasing, but the DM yield and LER on DM yield of wild soybean were decreased at the same time.With increasing the sudangrass sowing rate,CP concentration and LER on CP yield basis of sudangrass,wild soybean and sudangrass-wild soybean forage were all increased.更多还原