摘要
河北坝上地区地处中国农牧交错带的华北段,农业生产以农牧复合经营为主,但是草食家畜的饲草料品质差、资源短缺是该地区发展畜牧业的瓶颈。采用随机区组试验,研究氮缓释肥脲醛含量(20%、30%和40%)和施氮量(30、60、90、120、150和180kg.hm-2)对坝上饲用玉米(Zea mays)青贮后的营养品质和发酵品质的影响,以解决该地区青贮饲料品质差的问题。结果表明,当缓释肥的脲醛含量为40%时,青贮的营养品质较好,但其有机酸的产量低于脲醛含量为30%和20%缓释肥处理的玉米青贮。比较不同含氮量的缓释肥,当施用缓释肥的含氮量为120kg.hm-2时,玉米青贮含氮量和干物质含量较高,青贮中中性洗涤纤维和酸性洗涤纤维含量较低,青贮中有机酸含量较高,青贮品质较好。
Hebei Bashang region is located in the farming-pastoral ecotone in north China. A compound management of agriculture and animal husbandry is a main way of agricultural production. In order to improve the situation of poor quality of forage and lack of forage resources for ruminants in the region, effects of applying contents of Urea Formaldehyde （20%, 30% and 40%） and Nitrogen （30, 60, 90, 120, 150 and 180 kg ·ha^-1 ）in slow-release Nitrogen fertilizers on maize silage quality were studied by using randomized experiment design. The results showed that nutritive quality of the silage treated with 40 Urea Formaldehyde was better than those with 30G and 20%, but the organic acid content was opposite. Compared to slow-release Nitrogen fertilizers of different N contents, the maize silage treated with 120 kg ·ha^-1 N had higher contents of crude protein, dry matter and organic acid and lower of neutral and acid detergent fiber than those of other treatments; and the quality of silage was better as well.
出处
《草业科学》
CAS
CSCD
北大核心
2012年第11期1749-1754,共6页
Pratacultural Science
基金
国家牧草产业体系和农业公益性行业专项"牧区家庭牧场资源优化配置技术模式研究与示范"(201003019)
关键词
脲醛
基肥
追肥
营养品质
发酵品质
wrea formaldehyde
base fertilizer
topdressing
silage nutritive quality
silage ferment quality
