Effects of Planting Density and Cutting Time on Hay Yield and Nutritional Value of Forage Soybean HN389

作     者：Liu Wei Guo Yue Lu Ya-lin Wang Bo HuaYi Zhu Si-qi Qin Li-gang Hu Guo-fu Liu Wei;Guo Yue;Lu Ya-lin;Wang Bo;Hua Yi;Zhu Si-qi;Qin Li-gang;Hu Guo-fu

作者机构：College of Animal Sciences and TechnologyNortheast Agricultural UniversityHarbin 150030China 

出 版 物：《Journal of Northeast Agricultural University(English Edition)》 (东北农业大学学报（英文版）)

年 卷 期：2022年第29卷第2期

页      面：18-27页

学科分类：09[农学] 0901[农学-作物学] 

基　　金：Supported by Fund of Popularization and Demonstration of Mixed Sowing of Forage Beans and Silage Corn to Improve Green Feeding Quality of Dairy Cows(2015RQXXJ013) 

主　　题：soybean nutritional composition yield planting density cutting time 

摘      要：Forage soybean is an important source of high protein *** screening and breeding not only can solve the adjustment of agricultural planting structure,but also can provide a large amount of high-protein forage material,and effectively solve the problem of a serious shortage of high-protein forage in herbivorous animal husbandry in *** this study,the feeding-type soybean strain HN389 was selected as experimental material,with three planting densities of 270000,405000 and 540000 plants•hm^(-2) and three cutting periods of the initial pod stage(R1),the initial grain stage(R2)and the early mature stage(R3)were set to determine the yield and feeding quality,in order to obtain the best planting density and harvest time of the *** results showed that in forage soybean strain HN389 at the R1 and R2 stages,plant height increased with increasing planting densities,while fresh and dry weight per plant decreased with increasing planting densities,and there was no significant difference at the R3 *** yield of hay at the R1,R2 and R3 stages increased firstly and then decreased with the increase of planting densities,and the yield per hectare was R3R2*** order of contents of crude protein(CP),neutral detergent fibers(NDF)and acid detergent fiber(ADF)in feeding quality of HN389 were R2R1R3,and ether extract(EE)content order was R3R1R2,and there was no significant difference among different *** principal components were extracted from five forage indexes including CP,NDF,ADF,EE and fresh grass yield by principal component *** cumulative contribution rate of principal components 1 and 2 was 90.053%,and their characteristic values were 3.617 and 0.885,*** a comprehensive evaluation,harvested at the R3 stage and the density was 405000 plants•hm^(-2),HN389 had the highest comprehensive score of 0.344,yield of 38035.53 kg•hm^(-2),CP,NDF,ADF and EE contents of 17.61%,17.61%,21.54%and 3.81%,respectively.