Effects of variety and planting density on biomass and nutritional quality of cassava stem and leaf
The study aimed to explore the impact of variety and planting density on the yield,agronomic traits,and nutritional quality of cassava stems and leaves.Using cassava varieties including GR891,YRS No.2 and SC205 as experimental materials,a randomized block design with variety(A)and planting density(B)as two factors was conducted in the dry and hot valley region of Yunnan with seven planting densities for field comparative experiments.The results showed that the yield of cassava stems and leaves first increased and then decreased with the increase of planting density,with higher stem and leaf yields obtained by planting according to B6 and B5,indicating that lower planting density was more suitable for the accumulation of dry matter in stems and leaves compared to higher planting density.Plant height increased with the increase of planting density,while stem thickness gradually decreased.From the perspective of the average membership function,varieties A1 and A3 showed the best nutritional quality when planted according to B4,and variety A2 showed the best nutritional quality when planted according to B2,with relatively higher crude protein content.Among the different varieties,A2 and A3 had superior yield,agronomic traits,and nutritional quality compared to A1.The study indicates that YRS No.2 is the most suitable variety for planting in the dry and hot valley region of Yunnan,with the optimal planting density of 50 000 plants/hm2,which can yield higher biomass of stems and leaves and has excellent nutritional quality.
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