旱作水稻生长期不同覆盖方式的农田N素平衡评估  

Evaluation of Nitrogen Balance for Different Mulching Methods in the Growth Stage of Dryland Rice

作　　者：艾应伟[1] 

机构地区：[1]四川大学生命科学学院,四川成都610065

出　　处：《土壤通报》2006年第4期688-690,共3页Chinese Journal of Soil Science

基　　金：国家基础研究发展规划项目(G1999011707);四川省青年科技基金项目(05ZQ026-051);四川省应用基础研究项目(04JY029-080-1)资助

摘　　要：通过田间小区试验，研究了盖秸、盖膜、秸秆和地膜双覆盖、裸地4种旱作覆盖方式与常规灌溉方式对水稻生长期间农田N素平衡的影响。结果表明：除旱作盖膜处理的农田N素平衡为负增长外，其余处理均为正增长，农田N素的增加量达22．62-53．30kg·hm^-2，不同处理间的差异表现为旱作盖秸〉旱作盖秸膜〉常规灌溉〉旱作裸地。The effect of nitrogen balance in farmland soil was studied under the condition of nude land cuhivation, straw coverage cultivation, film coverage cultivation and straw and film coverage cultivation in dryland by comparing to normal irrigation cultivation in the growth stage of rice. The results showed that the nitrogen content in farmland soil decreased in the treatment of film coverage dryland cultivation, while the rest treatments just rose and the content of N increased by 22.62-53.30kg·hm^-2 in farmland soil. The change of N in farmland soil was in the order： straw coverage dryland cultivation 〉 straw and film coverage dryland cultivation 〉 normal irrigation cultivation 〉 nude dryland cultivation in different treatments.

关 键 词：水稻 旱作 覆盖方式 N素平衡 

分 类 号：S153.61[农业科学—土壤学] S511[农业科学—农业基础科学]