Field performance and nutritive value of sweet sorghum in eastern China
Field performance and nutritive value of sweet sorghum in eastern China
复制标题
DOI：
10.1016/j.fcr.2013.12.010
复制
发表时间：
2014-02
影响因子：
5.8
通讯作者：
Hui Qu;X. Liu;C. Dong;Xiaoping Lu;Yixin Shen
中科院分区：
文献类型：
--
作者：
Hui Qu;X. Liu;C. Dong;Xiaoping Lu;Yixin Shen
本研究的目的是评估甜高粱(cv。作为绿色饲料的来源及其在潮湿环境中作为青贮作物的潜力。以田间生产性能和营养价值为指标，比较了1个甜高粱品种和2个玉米品种的干物质产量和饲料品质。采用完全随机区组设计，每组3个重复，在乳期（MS）和面团期（DS）采收2年。甜高粱的叶面积指数（LAI）和株高均高于玉单8号和登海9号玉米品种。甜高粱在DS阶段的干物质（DM）含量高于青贮所需的最低DM含量（247g kg - 1），但低于两个玉米品种（P< 0.05）。两年内甜高粱干物质平均产量（43.0 tha - 1）高于玉米品种（27.0 ~ 28.8 tha - 1） （P< 0.05）。甜高粱DM粗蛋白质（CP）和体外DM消化率（IVDMD）与玉米无显著差异（变化幅度为52.1 ~ 56.6 g kg - 1DM）。甜高粱中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）在2008年除NDF外均高于2个玉米品种（P< 0.05）。数据表明，甜高粱产量高于玉米，且CP含量和IVDMD相近。在中国东部相对湿润的环境中，甜高粱作为替代玉米的青贮作物，具有稳定的营养价值和多次收获的潜力。
The objective of this study was to estimate the feasibility of sweet sorghum (cv. Hunnigreen) as a source of green fodder and its potential as a silage crop in humid environments. One variety of sweet sorghum and two varieties of corn were compared in dry matter (DM) yield and forage quality, as measured by field performance and nutritive value. Forages were grown in a complete randomized block design with 3 replications over a two year period, harvested at the milk stage (MS) and dough stage (DS). The sweet sorghum had higher leaf area index (LAI) and plant height than both Yudan 8 and Denghai 9 corn varieties because of its characteristic lateness. Dry matter (DM) content of sweet sorghum at DS was above the minimum DM content (>247 g kg−1) needed for optimum ensiling though lower (P< 0.05) than both corn varieties. Mean DM yield of sweet sorghum (43.0 t ha−1) at DS, in two years, was higher (P< 0.05) than both corn varieties (27.0–28.8 t ha−1). Crude protein (CP) in DM andin vitroDM digestibility (IVDMD) of sweet sorghum had no significant difference compared to corn (a change of 52.1–56.6 g kg−1DM). Neutral detergent fiber (NDF) and acid detergent fiber (ADF) of sweet sorghum was higher (P< 0.05) than that of both corn varieties except for NDF at MS in 2008. Data indicated that sweet sorghum has a higher yield than corn, with similar CP content and IVDMD. Stable nutritive value and multiple harvests of sweet sorghum offers great potential as an alternative silage crop compared to corn in the relatively humid environment of eastern China.