品种和种植密度对木薯茎叶生物量及营养品质的影响  

Effects of variety and planting density on biomass and nutritional quality of cassava stem and leaf

作　　者：宋记明 刘光华[3] 段春芳[1,2] 姜太玲 李月仙[1,2] 肖明昆 沈正松 严炜[1,2] SONG Ji-ming;LIU Guang-hua;DUAN Chun-fang;JIANG Tai-ling;LI Yue-xian;XIAO Ming-kun;SHEN Zheng-song;YAN Wei

机构地区：[1]热带作物生物育种全国重点实验室,云南昆明650205 [2]云南省农业科学院热带亚热带经济作物研究所,云南保山678000 [3]云南省农业科学院国际农业研究所,云南昆明650205

出　　处：《饲料研究》2024年第16期118-124,共7页Feed Research

基　　金：云南省李开绵专家工作站(项目编号:202305AF150004);国家木薯产业技术体系保山综合试验站(项目编号:CARS-11-YNLGH)。

摘　　要：研究旨在探讨品种和种植密度对木薯茎叶产量、农艺性状及营养品质的影响。以木薯桂热891、云热薯2号、华南205为试验材料,选择品种(A)、种植密度(B)两个因素进行随机区组设计,在云南干热河谷区进行7个种植密度的田间比对试验。结果显示,木薯茎叶产量随种植密度增加呈先升高后下降的趋势,按B6、B5种植可收获较高的茎叶产量,低种植密度比高种植密度更适合茎叶干物质的积累。株高随种植密度的增加呈升高趋势,而茎粗则逐渐下降。根据平均隶属函数结果可知,A1、A3按B4种植营养品质最佳,A2按B2种植营养品质最佳,且粗蛋白含量相对较高。不同品种间,A2、A3的产量、农艺性状、营养品质优于A1。研究表明,云热薯2号为适宜云南干热河谷区种植品种,其适宜种植密度为50 000株/hm2,可收获较高的茎叶生物产量,且营养品质佳。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 50000 plants/hm2,which can yield higher biomass of stems and leaves and has excellent nutritional quality.

关 键 词：品种 种植密度 木薯 茎叶产量 

分 类 号：S816[农业科学—饲料科学]