摘要
提出作物有效营养面积新概念 ,并用回归理论对此进行试验研究。通过玉米、甜菜试验研究 ,建立植株个体营养面积与产量关系的模型 ,优化解析出玉米有效营养面积为 0 3 3 5m2 ( 5 7 9cm×5 7 9cm) ;甜菜有效营养面积为 0 3 5 8m2 ( 5 3 4cm× 67cm)。据此阐明目前生产上广泛采用 67～ 70cm的垄作 ,已超过玉米、甜菜的有效株行距 ,造成土壤等资源的浪费。采用 5 5cm的垄种植甜菜比 67cm的常规垄增产 1 9 8%。
A new concept of Effective Nutrient Soil Areas (ENSA) was put forward and studied with the regression method. Through conducting experiments with corn and sugar beet, a model of the relationship between ENSA and yield of an individual crop was established. By using the model, an optimal ENSA of corn was worked out as 0.335 m2(57.9 cm×57.9 cm)and that of sugar beet as 0.358 m2(53.4 cm×67 cm). Therefore, for corn and sugar beet the ridge planting method of 67～70 cm in spacing, which is applied widely in the current production, is wasting soil resources, because the plant has a space larger than the ENSA of the crop. The results of the narrower space tests with the new theory show that their yields are about 19.8% higher than those of the normal ridge planting method.
出处
《土壤学报》
CAS
CSCD
北大核心
2003年第5期711-716,共6页
Acta Pedologica Sinica
基金
国家"九五"科技攻关项目 ( 96-0 0 4-0 2 -0 6)
中国科学院创新工程项目 (KZCXI -Y -CA -0 4和KZCXZ -SW -41 6)资助
关键词
作物
土壤
营养面积
回归理论
产量
有效株行距
Effective nutrient soil area, Optimal nutrient soil area, Individual, Colony, Yield
