水稻与杂草竞争模式及其系统序参量的应用

引用耗散结构理论研究了水稻与杂草的竞争关系，得出了水稻生长前、后期水稻——杂草系统序参量q1,q2与产量损失率Y的关系式，即Y=125．93e^-1.0373q1、Y=94．417e^-0.7813q2和系统分岔点为qA=1．1248、qn=2．8736。并提出当水稻与杂草的负熵比q1〉1．1248，促使系统向高层次有序态发展，而q2〉2．8736，则形成水稻群体占绝对优势的新稳定态。通过对除草剂的不同剂量和优化组合结构及不同地区的示范试验结果表明：当序参量q1〉qA=1．1248、q2〉qB=2．8736时，水稻——杂草生态系统形成了高层次的有序态，用序参量作为稻田杂草防除阈值指标是完全可行的。

Competition Correlation between Rice and Weed and Application of Order Parameter of System

The competition correlation between rice and weed was studied by dissipative structure theory,investigation results showed that the related equation of order parameter (q) of rice-weed system and loss of rice yield (Y) was Y=125.93e~(-L0373q1) and Y=94.417e~- ~(0.7813q2) at early and late stages of rice growing respectively,order parameter of system q_A and q_B at separation point of system was equal to 1.1248 and 2.8736,and put forward s new theory that the rice-weed ecological system helped to form high l...