XUE Pei-pei,WANG Ke-qin,GENG Yang-hui,et al.Effects of Different Soil Moistures on Ecological Physiology Characteristic of Zizyphus mauritiana Lam. in Dry-hot River Valley[J].Research of Soil and Water Conservation,2009,16(05):186-189,193.
金沙江干热河谷不同土壤水分对台湾青枣生理生态特性的影响
- Title:
- Effects of Different Soil Moistures on Ecological Physiology Characteristic of Zizyphus mauritiana Lam. in Dry-hot River Valley
- 分类号:
- S152.7;S665.1
- 摘要:
- 为了更好地指导金沙江干热河谷地区台湾青枣的种植，提高产量，该文研究了4种不同土壤水分处理（A，B，C，D处理的土壤含水率在台湾青枣的全育期分别保持在田间持水量的40%～55%，55%～70%、70%～85%、85%～100%）对台湾青枣净光合速率和蒸腾速率的影响，分析了土壤水分和光合速率、土壤水分和蒸腾速率的关系，计算出不同土壤水分处理的水分利用率，得出以下结论：（1）净光合速率的日变化和季节变化均呈现“双峰”曲线，在土壤含水率为田间持水量的70%～85%时达到最大；（2）蒸腾速率的日变化和季节变化均呈现“双峰”，随着土壤含水量的增加而增大，土壤含水率为田间持水量的85%～100%时达到最大，日变化最大值为10.95 mmol/（m2·s），季节变化最大值出现在6月，为10.2mmol/（m2·s）；（3）水分利用率在土壤含水率为田间持水量的55%～70%时达到最大，日变化最大值出现在8：00，为7.63μmol/mmol，季节变化平均值为1.85μmol/mmol。
- Abstract:
- In order to guide the cultivation of Zizyphus mauritiana Lam.in dry-hot river valley,and improve the yield.This essay studied the effects of different soil moistures (A,B,C,D were: rate of soil moisture was 40%～55%,55%～70%,70%～85%,85%～100% of field moisture capacity respectively during the whole period of growth) on photosynthesis rate (Pn) and transpiration rate (Tr) of Zizyphus mauritiana Lam.The relationships between soil moisture and Pn,soil moisture and Tr were analyzed,then water use efficiency (WUE) was calculated.The results were gained as follows: (1) The diurnal variation and the seasonal variation of Pn both presented double-peaked curves,and they were highest when rate of soil moisture was 70%～85% of field moisture capacity; (2) The diurnal variation and the seasonal variation of Tr also presented double-peaked curves.They increased as soil moistures increasing,and they were highest when rate of soil moisture was 85%～100% of field moisture capacity.The highest number of diurnal variation was 10.95 mmol/(m2·s),the highest number of seasonal variation appeared in June,and it was 10.2mmol/(m2·s); (3) WUE reached the highest when rate of soil moisture was 55%～70% of field moisture capacity.The highest number arrived at 8:00,was 7.63μmol/mmol,the mean number of seasonal variation was 1.85μmol/mmol.
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备注/Memo
收稿日期:2009-3-11;
基金项目:云南省环境科学与工程创新人才培养基地项目（A3003015）;国家重点科研基金项目（30660037）
作者简介:薛沛沛(1982-)，女，河南平顶山人，工程师，硕士，从事森林食品与开发研究工作。E-mail：yunyun44877044@tom.com