| 晋北半干旱区免耕对玉米光合和蒸腾特性的影响 |
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| 引用本文： | 孙东宝,孙高东,王庆锁.晋北半干旱区免耕对玉米光合和蒸腾特性的影响[J].中国农业气象,2010,31(2):235-239. |
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| 作者姓名： | 孙东宝 孙高东 王庆锁 |
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| 作者单位： | 1. 中国农业科学院农业环境与可持续发展研究所/农业部旱作节水农业重点开放实验室,北京,100081
2. 山西省浑源县畜牧局,浑源,037400 |
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| 基金项目： | “十一五”国家科技支撑计划课题(2006BAD29B05) |
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| 摘 要： | 采用田间小区试验,对覆盖免耕、留茬免耕和传统翻耕三种耕作方式下玉米不同生育期土壤温度、土壤含水量以及玉米蒸腾速率和净光合速率进行观测。结果表明:与翻耕相比,免耕可降低0-20cm土层的土壤温度;覆盖免耕玉米地土壤温度的降低幅度较大,而留茬免耕地则较小;免耕对土壤温度的降低作用随着玉米的生长发育而减弱。免耕能够提高土壤含水量,尤其是0-60cm土层。免耕与翻耕相比,在玉米苗期,叶片的蒸腾和光合速率降低,其中覆盖免耕玉米日平均蒸腾与光合速率比翻耕分别降低了8.5%和9.7%,差异显著;留茬免耕略有降低,但差异不显著。在拔节前期,免耕与翻耕田玉米的蒸腾和光合速率无显著差异;在拔节后期、抽穗期和灌浆期,覆盖免耕玉米蒸腾和光合速率均比翻耕显著提高;留茬免耕在灌浆期玉米的蒸腾与光合速率均比翻耕显著提高,其它时期与翻耕差异不显著。
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| 关 键 词： | 免耕 玉米 蒸腾速率 光合速率 |
Effects of No-tillage on the Photosynthesis and Transpiration of Maize in the Semi-arid Area of Northern Shanxi Province |
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| SUN Dong-bao,SUN Gao-dong,WANG Qing-suo.Effects of No-tillage on the Photosynthesis and Transpiration of Maize in the Semi-arid Area of Northern Shanxi Province[J].Chinese Journal of Agrometeorology,2010,31(2):235-239. |
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| Authors: | SUN Dong-bao SUN Gao-dong WANG Qing-suo |
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| Institution: | 1.Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Sciences/Key Laboratory of Dryland Agriculture,Ministry of Agriculture,Beijing 100081,China; 2.Animal Husbandry Bureau of Hunyuan County,Shanxi Province,Hunyuan 037400) |
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| Abstract: | The experiment was carried out in the field with three treatments i.e. conventional till (CT),non-till with retaining maize stubble (NT) and mulch-till with un-chopped maize straw mulch (MT).The soil temperature,soil water content,transpiration and photosynthesis of maize in CT,NT and MT were observed. The soil temperature of maize field in no-tillage practices including MT and NT decreased comparing to that in CT. The decrease of the soil temperature was high in MT,and low in NT. The differences of the soi... |
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| Keywords: | No-till Maize Transpiration rate Photosynthesis rate |
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