摘要
以中国科学院桃源农业生态试验站为例,以"机制法"的逐级衰减原理为基础,引入土地生产力指数模型中的PI指数作为土壤有效系数对气候生产潜力进行修正,得到了南方红壤丘陵区水稻田的土地生产潜力.研究结果表明:早稻的实际产量与水稻田的土地生产潜力符合程度较高,多数年份的实际产量为稻田土地生产潜力的83.0%~92.7%;晚稻的实际产量均超出了水稻田的土地生产潜力,但属于合理的范围之内.水稻田的土地生产潜力可以作为模拟水稻产量的基础性框架;南方红壤丘陵区光热条件良好,但降雨季节性分布相差较大,土壤pH值、有机质和速效磷含量偏低是影响水稻产量的主要因素.
Taoyuan agricultural and ecological experiment station of the Chinese Academy of Sciences is selected as the representative area of red soil hilly region for the study of the land potential productivity.Using the principle of mechanism method and combining with productivity index model to calculate land potential productivity.The results showed that most actual yields of early rice investigated are 83.0%~92.7% of the land potential productivity.Although all the actual yields of the second rice are higher th...
出处
《陕西师范大学学报(自然科学版)》
CAS
CSCD
北大核心
2009年第6期82-86,92,共6页
Journal of Shaanxi Normal University:Natural Science Edition
基金
国家863高技术资助项目(2007AA10Z222)
关键词
机制法
水稻
土壤有效系数
土地生产潜力
mechanism method
rice
productivity index model
land potential productivity