摘要
良种是作物增产的内因,是先进技术的物化载体。本文以我国年推广面积曾上千万亩的玉米杂交种为实证,探索玉米杂交种扩散的客观规律、特征特性及其影响因素,研究发现:玉米主要杂交种扩散模型符合Gaussian模型,经济寿命在7.2-23.0年之间,平均为13.8年。
Seed is the internal factor of improved crop yield and is the materialization of advanced technology vector. This paper explored innovative maize hybrid spread of the objective laws,characteristics and influencing factors for the maize hybrids for the evidence that its area had 66.7 million hm2 to 20th century in China since the late 1960s,and the results showed:Different maize hybrid with the promotion of the same trend,Gaussian model can be used to fit hybrid maize planting area with the promotion of the year process of change,and corn hybrids had average life expectancy of 13.8 years.
出处
《中国软科学》
CSSCI
北大核心
2011年第S2期115-120,共6页
China Soft Science
基金
973计划课题(2009CB118601)
农业科技成果转化资金"典型生态区玉米高产高效生产技术集成与示范推广"等项目资助
