| 甘蔗//大豆间作和减量施氮对甘蔗产量、 植株及土壤氮素的影响 |
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| 引用本文： | 杨文亭,李志贤,舒磊,王建武. 甘蔗//大豆间作和减量施氮对甘蔗产量、 植株及土壤氮素的影响[J]. 生态学报, 2011, 31(20): 6108-6115 |
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| 作者姓名： | 杨文亭 李志贤 舒磊 王建武 |
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| 作者单位： | 华南农业大学热带亚热带生态研究所,华南农业大学农业部生态农业重点开放实验室,华南农业大学广东省高等学校农业生态与农村环境重点实验室,广州,510642 |
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| 基金项目： | 国家重大基础研究计划项目(2011CB100400); 国家科技支撑计划项目(2007BAD89B14); 广东省科技计划资助项目(2008A020100011) |
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| 摘 要： | 通过田间试验探讨了甘蔗//大豆1 ∶ 1、1 ∶ 2间作模式和施氮(300 kg/hm2,525 kg/hm2)水平对甘蔗鲜重产量、甘蔗单株氮含量、土壤硝态氮、铵态氮以及微生物量氮的影响。结果表明:减量施氮(300 kg/hm2)水平下,间作甘蔗鲜重产量较单作显著下降,但间作的土地当量比均大于1,且大豆产量为1.52和3.25 t/hm2。不同施氮水平对甘蔗鲜重无显著影响,施氮水平和种植模式对甘蔗单株氮吸收量、甘蔗收获后土壤硝态氮和微生物量氮均无显著影响。土壤氮素随甘蔗大豆的不同生长时期而变化,在甘蔗分蘖末期(大豆收获期)达到最低值,此时期减量施氮水平下甘蔗//大豆间作模式(1 ∶ 1)土壤硝态氮显著高于单作。综合以上结果,从提高土地利用率和保护农业生态环境考虑,甘蔗//大豆间作模式下减量施氮具有一定的可行性。
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| 关 键 词： | 甘蔗//大豆间作 产量 硝态氮 铵态氮 微生物量氮 |
| 收稿时间： | 2011-06-07 |
| 修稿时间： | 2011-07-11 |
Effect of sugarcane//soybean intercropping and reduced nitrogen rates on sugarcane yield, plant and soil nitrogen |
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| YANG Wenting,LI Zhixian,SHU Lei and WANG Jianwu. Effect of sugarcane//soybean intercropping and reduced nitrogen rates on sugarcane yield, plant and soil nitrogen[J]. Acta Ecologica Sinica, 2011, 31(20): 6108-6115 |
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| Authors: | YANG Wenting LI Zhixian SHU Lei WANG Jianwu |
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| Affiliation: | Institute of Tropical and Subtropical Ecology, South China Agricultural University; Key Laboratory of Ecological Agriculture of Ministry of Agriculture, South China Agricultural University; Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions, South China Agricultural University, Guangzhou 510642, China;Institute of Tropical and Subtropical Ecology, South China Agricultural University; Key Laboratory of Ecological Agriculture of Ministry of Agriculture, South China Agricultural University; Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions, South China Agricultural University, Guangzhou 510642, China;Institute of Tropical and Subtropical Ecology, South China Agricultural University; Key Laboratory of Ecological Agriculture of Ministry of Agriculture, South China Agricultural University; Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions, South China Agricultural University, Guangzhou 510642, China;Institute of Tropical and Subtropical Ecology, South China Agricultural University; Key Laboratory of Ecological Agriculture of Ministry of Agriculture, South China Agricultural University; Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions, South China Agricultural University, Guangzhou 510642, China |
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| Abstract: | Sugarcane(Saccharum sinensis Roxb) is an important sugar crop in China which mainly produced in subtropical and tropical region of China.Wide row spacing(120 cm) and initial slow growth rate of sugarcane offers a suitable space and resources(water,nutrition,light) niche for intercropping in sugarcane.Meanwhile,over input of nitrogenous fertilizer was also a big problem which results in soil acidification and environmental pollution.How to reduce nitrogen application and design suitable sugarcane intercroppi... |
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| Keywords: | sugarcane-soybean intercropping yield nitrate nitrogen ammonium nitrogen microbial biomass nitrogen |
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