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| 不同施肥时间及施氮水平对高寒草甸生物量和土壤养分的影响 | |
| 引用本文： | 卡着才让,德科加,徐成体.不同施肥时间及施氮水平对高寒草甸生物量和土壤养分的影响[J].草地学报,2015,23(4):726-732. |
| 作者姓名： | 卡着才让 德科加 徐成体 |
| 作者单位： | 1. 河南县草原站, 青海 优干宁 811599; 2. 青海省畜牧兽医科学院, 青海 西宁 810016 |
| 基金项目： | 农业部公益性行业(农业)科研专项 |
| 摘 要： | 采用随机区组设计,探讨了不同施肥时期及氮肥用量对三江源区高寒草甸初级生产力、植物养分及土壤养分的影响。结果表明:在施肥时间为7月10日,施肥量为150 kg·hm-2时,地上生物量为最大值,较对照增加了2.06倍(P <0.05)。而植物氮素含量在施肥时间为7月10日,尿素用量为300 kg·hm-2时达到最大值,较对照增加了31.18%(P <0.05)。相关性分析表明,地上生物量与植物全氮成显著正相关,施氮量与植物全氮成线性相关。施肥时间为7月10日左右时,尿素施用水平为150~300 kg·hm-2,该类型高寒草甸初级生产力和土壤全氮都达到最大值,可作为优先氮素添加量来推荐。 |
| 关 键 词： | 高寒草甸 施肥 初级生产力 相关性 |
| 收稿时间： | 2014-07-04 |
The Effects of Different Fertilizer Times and Nitrogen Levels on Biomass and Soil Nutrients in Alpine Meadow |
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| KA Zhuo-cairang,DE Ke-jia,XU Cheng-ti.The Effects of Different Fertilizer Times and Nitrogen Levels on Biomass and Soil Nutrients in Alpine Meadow[J].Acta Agrestia Sinica,2015,23(4):726-732. | |
| Authors: | KA Zhuo-cairang DE Ke-jia XU Cheng-ti |
| Institution: | 1. Grassland Station of Henan County, Youganning, Qinghai Province 811599, China; 2. Qinghai Academy of Animal and Veterinary Science, Xining, Qinghai Province 810016, China |
| Abstract: | The effects of different fertilizer application time and amount on biomass, plant nutrients, and soil nutrients were studied using random block design in Alpine meadow in the Three-River Source Region. The results showed that aboveground biomass reached maximum under the application amount of 150 kg·hm-2 and application time of 10th July, increased by 2.06 times than CK(P< 0.05). Compared with CK, the plant nitrogen increased by 31.18% (P< 0.05) under the application amount of 300 kg·hm-2 and application time of 10th July. Correlation analysis showed that plant total nitrogen was significantly positive correlated with aboveground biomass. There were positive correlation between nitrogen fertilizer and plant total nitrogen. Above findings suggested that primary productivity and soil total nitrogen values were maximum when fertilizer amount was from 150 kg·hm-2 to 300 kg·hm-2 and fertilizer time was 10th July. |
| Keywords: | Alpine meadow Fertilizer Primary productivity Correlation |
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