Study on Intercropping Patterns and Silage Quality of Gramineous Forage and Leguminous Forage in Alpine Area of Shangri-La
In order to alleviate the limitation of forage shortage on the development of animal husbandry in the alpine region of Shangri-La,different intercropping patterns and silage quality of gramineous forage and leguminous forage were studied to explore the suitable grass-legume intercropping mode.In this research,A.sativa and V.villosa Roth var.were used as experimental materials,and four seeding rates of gramineous forage and leguminous forage(T1:13∶2;T2:12∶3;T3:10∶5;T4:8∶7)were set up.Plant height,yield,and control effect of weeds and pests under different treatments were measured.Results showed that compared with A.sativa monoculture,intercropping had little effect on plant height,twining degree and occurrence of pests and diseases(P>0.05)in early growth stage,except for total coverage and the coverage of A.sativa.However,it had a certain promoting effect on A.sativa plant height(174.9,163.3,160.3,178.2 cm)of different intercropping treatments(T1,T2,T3,T4)in the later stage.Compared with A.sativa monoculture,the total fresh grass and total hay yields increased by 32.0%—58.3%and 35.2%—70.3%,respectively(P<0.05).Furthermore,the total coverage under intercropping treatment was significantly higher than that of A.sativa monoculture(P<0.01),and the incidences of leaf spot disease(13.50%)and lodging rate(6.50%)of A.sativa were the lowest in T3 treatment.In addition,there were significant effects on weed control in T3 and T4 treatments(P<0.01).The quality of silage was significantly improved after intercropping treatment.The crude protein contents of mixed silage treated with T3 and T4 were 5.20 and 7.51 percentage points higher than that of A.sativa monoculture.The acid detergent fiber contents were 5.37 and 10.11 percentage points lower than that of A.sativa monoculture.Comprehensively considering plant height,yield,lodging rate,control effect of weed,pest and disease,and silage nutrient,it is suitable to choose the intercropping seeding rate of A.sativa and V.villosa Roth var.at 10∶5.
A.sativaV.villosa Roth var.IntercroppingSilage qualityAlpine Area
万方数据
维普
