生草果园草被残体氮磷分解规律研究

李发林; 黄炎和; 林晓兰; 郑域茹; 蔡志发; 林永贤; 叶亚海; 武英

生草果园草被残体氮磷分解规律研究

1.
福建省热带作物科学研究所, 福建漳州 363001;
2.
福建农林大学资源与环境学院, 福建福州 350002;
3.
漳州市水土保持办公室, 福建漳州 363000;
4.
龙海市水土保持试验站, 漳州龙海 363112

基金项目:

福建省生态学重点学科建设项目(0608537);福建省科技计划项目——省属公益类科研院所基本科研专项(2009R10010-2)

详细信息

通讯作者:
黄炎和(1962-),男,博士,教授,博士生导师,主要从事土壤侵蚀与侵蚀退化土地生态恢复途径研究(E-mail:yanhehuang@hotmail.com)

中图分类号: S605
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出版历程
- 收稿日期: 2012-04-15
- 修回日期: 2012-05-19
- 刊出日期: 2012-08-29

Nitrogen and Phosphorus Decomposition of Debris from Orchard Grass

1.
Fujian Institute of Tropical Crops, Zhangzhou, Fujian 363001, China;
2.
College of Resources and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China;
3.
Zhangzhou Offiee of Soil and Water Conservation, Zhangzhou, Fujian 363000, China;
4.
Longhai Experimental Station of Soil and Water Conservation, Longhai, Fujian 363112, China

摘要

摘要: 采用样方收获法对人工多年生草果园草被残体的量进行测定,并进行果园草被残体原位分解试验。结果表明:4种草被(圆叶决明、百喜草、宽叶雀稗、日本草)的样方残体量分别为406.00、1 582.28、1 542.62、658.07 g,分别占其样方地上部物质总量的33.8%、76.1%、59.4%、100.0%;百喜草、圆叶决明、日本草草被残体半腐解时间为5个月,而宽叶雀稗为6个月;4种草被残体年释放量为残体氮素贮量的90.86%、67.76%、88.45%、88.33%,折合果园氮素年释放81.16、119.02、219.68、58.71 kg·hm-2;4种草被残体磷素年释放量分别为残体贮量的84.46%、80.32%、90.90%、87.22%,折合磷素年释放量为167.69、534.96、604.49、343.22 kg·hm-2。
- 果园生草 /
- 残体 /
- 氮 /
- 磷 /
- 分解
Abstract: Grass residues and decomposition of nitrogen and phosphorus in grassing orchards were studied by using the harvest quadrat method. The residues of the 4 grasses, Chamaecrista rotundifolia,Paspalum natatum, Paspalum wetsfeteinii and Borreria latisolia, were 406.00, 1 582.28, 1 542.62 and 658.07 g, respectively, accounting for 33.8%, 76.1%, 59.4%, and 100.0% of the total, respectively. The half-decomposition time of the grass residues was 5 months for P. natatum, C. rotundifolia and B.latisolia, while 6 months for P.wetsfeteini. The nitrogen storage of the annual losses of the 4 grass residues were 90.86%, 67.76%, 88.45% and 88.33%, respectively, which equated the annual losses of orchard nitrogen of 81.16, 119.02, 219.68 and 58.71 kg穐m-2, respectively. These were far less than 864 kg穐m-2.The phosphorus storage of the annual losses of the 4 grass residues were 84.46%, 80.32%, 90.90% and 87.22%, respectively, which equated the annual losses of orchard phosphorus of 167.69, 534.96, 604.49 and 343.22 kg穐m-2, respectively. These were less than the amount of adsorbable phosphorus in the cultivated soil.
- grassing orchard /
- residues /
- nitrogen /
- phosphorus /
- decomposition