土壤水分状况与水稻生长的关系  

RELATIONSHIP BETWEEN WATER CONDITION OF SOIL AND RICE GROWTH

作　　者：王昌全[1,2,3] 曾莉 卢俊宇[1,2,3] 曾守鲁 张显仲 宋斌[1,2,3] 李廷轩 张仁绥 

机构地区：[1]四川农业大学农学院 [2]名山县农业局土肥站 [3]雅安地区农业局土肥站

出　　处：《西南农业学报》1997年第2期67-70,共4页Southwest China Journal of Agricultural Sciences

摘　　要：研究了淹水、田间持水量、６０％田间持水量３种水分条件下水稻生长发育状况、蒸散量和产量。结果表明土壤水分含量与水稻产量呈极显著或显著正相关；水稻蒸散量在淹水条件下为６０５毫米，６０％～８０％田间持水量条件下为３４７毫米，孕穗期和灌浆期日蒸散量大。土壤含水量在田间持水量以下时，土壤中无机氮以硝态氮为主，而水稻体内缺乏硝酸还原酶，这是造成水稻氮素营养障碍的重要原因。The rice growth and development,evapotranspiration and rice yield under the conditions of submersion,field capacity and 60 %field capacity were studied.The results showed as following:soil water content was correlated highly significantly or significantly with rice yield.Rice evapotranspiration content under submersion condition was 605mm while that in 60%～80% field capacity was 347mm.The evapotranspiration per day was higher during boot and milk stage.When water content of soil was below the field capacity,the majority of inorganic nitrogen was nitrate nitrogen (NO 3-N).Because there was no nitrate reductase in rice plants,it might be the main reason that resulted in the nitrogen nutrition obstacle of rice.Proline content can be taken as the indicator of water stress in rice.

关 键 词：水稻 土壤水分 蒸散量 硝酸还原酶 脯氨酸 

分 类 号：S511.061[农业科学—作物学]