Effects of Intercropping Mixture of Legume and Grass on Grassland Production Performance and Soil Nutrients
To determine the optimal planting pattern for mixed forage in northern Xinjiang,an inter-cropping mixture experiment was conducted at the Xinjiang Xerophytic Grassland Seed Base of the Ministry of Agriculture(Hutubi County,Xinjiang).Seeding ratios of 1∶1,1∶2,1∶3,2∶1,and 3∶1 were applied for fabaceae and gramineae and monoculture of Medicago sativa(MX)and Agropyron cristatum(BC)were two controls.The study examined the effects of different sowing ratios of mixture on forage nutrient qual-ity,soil nutrient levels,and grassland biomass.The overall advantage was assessed by principal compo-nent analysis and gray correlation analysis.The results showed that(1)When the ratio of fabaceae/gra-mineae was 1∶1,there was a little reduction in interspecific competition and a larger forage biomass yield,12.63 t/hm2 compared to monoculture.(2)The mixture of 1∶1 ratio increased crude protein content,crude fat content,and relative feeding value by 16.00%,1.77%,and 104.52,respectively.Also with at least 35.01%of ADF content and at most 4.86%of soluble sugar concentration,the 1∶1 mixture ratio per-formed better in thorough evaluation of nutritional value compared to two monocultures.(3)A particular correlation was noted between the soil nutrient content and the ratio of mixed sowing.With a mixture ratio of 1∶2,the total nitrogen and potassium contents in the soil were 1.17 g/kg and 13.38 g/kg,respectively.Intercropping contributed more to soli nutrient accumulation compared to monocultures.The comprehen-sive benefit evaluation indicated that 1∶1 is recommended for high forage yield and high forage nutrition quality,whereas 1∶2 is more proper for the accumulation of soil nutrients.
万方数据
维普
