| 前茬施氮对皖草2号草产量影响的研究 |
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| 引用本文： | 董召荣,李焰焰,朱玉国,陈程,宋贺,李晓玲.前茬施氮对皖草2号草产量影响的研究[J].草业科学,2007,24(6):27-31. |
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| 作者姓名： | 董召荣 李焰焰 朱玉国 陈程 宋贺 李晓玲 |
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| 作者单位： | 安徽农业大学农学院,安徽,合肥,230036;安徽农业大学农学院,安徽,合肥,230036;阜阳师范学院,安徽,阜阳,236032 |
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| 基金项目： | 安徽省科技攻关项目，安徽省教育厅科研项目，阜阳师范学院校科研和教改项目，安徽省高校中青年学科带头人培养对象计划项目 |
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| 摘 要： | 研究前茬施氮水平和施氮方式与后茬皖草2号草产量及全年草产量的动态关系.结果表明:前茬施氮能增加皖草2号的株高,尤以前茬氮肥分期施用处理最为明显.随前茬氮肥水平的加大,后茬皖草2号的鲜草、干草产量相应提高,其中前茬纯氮肥施用量达225 kg/hm2以上时,后茬皖草2号的鲜草、干草产量达到较高水平.相同施氮水平条件下,前茬氮肥分期施用比一次性基施的鲜草、干草产量高.前茬氮肥施用量的增加与氮肥分期施用均能提高小黑麦Triticale cereale-皖草2号Sorghum bicolor×S.sudanense的全年草产量,且差异达极显著水平,前茬纯氮施用量为300和375 kg/hm2且分期施用时,2茬牧草全年干草总产量均可达到较高水平,且两者之间的差异不显著.
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| 关 键 词： | 前茬施氮 皖草2号 草产量 |
| 文章编号： | 1001-0629（2007）06-0027-05 |
| 收稿时间： | 2006-04-14 |
| 修稿时间： | 2006-04-14 |
Effect of last-crop nitrogen fertilizing on the grass yield of Wancao No.2 |
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| DONG Zhao-rong,LI Yan-yan,ZHU Yu-guo,CHEN Cheng,SONG He,LI Xiao-ling.Effect of last-crop nitrogen fertilizing on the grass yield of Wancao No.2[J].Pratacultural Science,2007,24(6):27-31. |
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| Authors: | DONG Zhao-rong LI Yan-yan ZHU Yu-guo CHEN Cheng SONG He LI Xiao-ling |
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| Abstract: | The dynamic relations between the different nitrogen application amounts/ methods and grass yield of next-crop/whole year's grass yield of Wancao No.2 were studied.The results showed that the height increased when nitrogen was used in last-crop,and the height was the highest when nitrogen was used twice.Fresh grass and hay yield of next-crop Wancao No.2 would increase with the increase of applied nitrogen amounts.The fresh and hay yields of next-crop Wancao No.2 reached the higher level when N fertilizer were used twice and at the level of more than 225 kg/hm2.Fresh and hay yields of last-crop Wancao No.2 under the treatment of twice nitrogen fertilizing were higher than those of once only.The whole year's dry grass yield of last-crop pasture was increased when N fertilizer was used twice and with the increase of applied nitrogen amounts,the difference was remarkable.The whole year's dry grass yields of last and next-crop pastures were the highest when N fertilizer was used twice and at the level of 300 and 375 kg/hm2,but the difference were not significant. |
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| Keywords: | last-crop nitrogen fertilizing Wancao No 2 grass yield |
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