| 张凤云,成雪峰,张恩和.河西绿洲区保护性耕作对土壤微生物量C和有机质的影响[J].干旱地区农业研究,2007,(4):172~175 |
| 河西绿洲区保护性耕作对土壤微生物量C和有机质的影响 |
| Effects of conservative tillage on soil microbial biomass and soil organic matter in Hexi Oasis |
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| DOI：10.7606/j.issn.1000-7601.2007.04.33 |
| 中文关键词: 免耕 秸秆覆盖 土壤微生物 土壤有机质 产量 |
| 英文关键词:no-tillage straw mulch soil microbial biomass soil organic matter yield |
| 基金项目:国家高科技发展计划(863计划)节水专项“北方内陆河灌区(甘肃张掖)节水农业技术体系集成与示范”（2002AA2Z4191） |
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| 中文摘要: |
| 试验设20 cm留茬压倒（NPS20）、40 cm留茬压倒(NPS40)、40 cm立秆(NS40)、20 cm立秆(NS20)、6 750 kg/hm2覆盖(NSB40)和3750 kg/hm2覆盖(NSB20)和传统耕作(CT)7个处理，研究了不同秸秆覆盖量、留茬高度和秸秆处理对土壤有机质、土壤微生物量C和作物产量的影响。结果表明：土壤微生物量C含量随季节变化表现为播种前最高，收获后最低；不同时期土壤操作措施对土壤微生物量C的影响不同。从播种期开始，保护性耕作土壤有机质含量大于传统耕作，且保护性耕作各处理土壤有机质随土层深度的增加而递减，而传统耕作各层次之间无差异；保护性耕作提高了春小麦的产量：NPS20、NPS40、NS40、NS20、NSB40和NSB20较CT分别增产53.08％、46.59％、40.81％、19.93％、17.33％和4.34％。 |
| 英文摘要: |
| The influences of different quality of mulching straw, the height of standing straw and straw treating style to soil microbial biomass C (SMB-C), soil organic matter content (OM) and grain yield(Y) were studied with a filed experiment in Hexi corridor. The results showed: there was a clear tendency that SMB-C changed with the changes of seasons and that before sowing was the highest and after harvesting was the lowest. Soil operation in different period had different influences on SMB-C. OM in conservative tillage treatment was higher than that of conventional tillage from sowing stage and that in conservative tillage decreased with the increase of soil layer and that in conventional tillage had no difference. Grain yield were improved by the conservative tillage with straw cover or straw standing, and that of NPS20、NPS40、NS40、NS20、NSB40 and NSB20 were increased by 53.08％、46.59％、40.81％、19.93％、17.33％ and 4.34％ respectively compared with CT. |
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