Abstract: Effect of organic fertilizer applications on yield and quality of sweet sorghum in the field was studied.Results showed that the plant height,fresh and dry weight of single plant,the content of acid-detergent fiber and neutral detergent fiber increased under the same nitrogen content with increasing organic fertilizer application,whereas crude protein and In vitro dry matter digestibility decreased.Both dry matter yield above-ground and digestible dry matter yield increased with increasing organic fertilizer application.The difference of crude protein yield among treatments had no significant change.Using increased urea,the content of crude protein and the growth rate of plant height were significantly improved in less time,but the productivity of dry matter was lowest for the treatment without organic fertilizer.These results showed that the sufficient organic fertilizer as basal fertilizer should be applied to obtain high yield in sweet sorghum.

Key words: Sweet sorghum, Organic fertilizer, Urea, DM yield, Quality

摘要： 通过田间试验研究有机肥施用量对甜高粱(Sorghum saccharatum Moench)饲草产量及品质的影响。结果表明:在有机肥基肥(发酵牛粪)和追肥(尿素)施氮量相等的条件下,随着有机肥基肥施用量的增加,甜高粱的株高、单株鲜重和单株干重、酸性洗涤纤维和中性洗涤纤维含量不断增加,粗蛋白含量和体外消化率不断下降;地上干物质产量和可消化干物质产量随有机肥基肥施用量的增加而显著增加,而单位面积粗蛋白产量在处理间无明显差异;追肥后,株高的生长速度和粗蛋白含量在短时间内随着追肥用量的增加而显著增加,但干物质生产能力以不施有机肥基肥而施较多追肥的处理最差。因此,在甜高粱饲草生产中,施足有机基肥可显著提高产量。

关键词: 甜高粱, 有机肥, 尿素, 干物质产量, 品质