露温露时和施氮量对稻瘟菌侵染的多元影响及其建模

 在人工气候室条件下研究了露温(DT),露时(DP),和施氮量(N)对稻瘟菌侵染的综合影响。发现这三个因子及其互作对侵染均有明显的作用,在供试条件和范围内,其作用大小为DP > DT > N > DP×DT > DT×N > DP×N > DP×DT×N。并得出了侵染的适合条件范围。本文首次在稻瘟侵染的研究中应用了侵染几率的概念,组建了侵染几率因气象和栽培因子而变的预测式。

QUANTITATIVE ANALYSIS OF THE RELATIONSHIP BETWEEN RICE BLAST AND ENVIRONMENTAL FACTORS INCLUDING DEW CONDITIONS AND NITROGEN FERTILIZERS

The effects of clew period (DP), dew temperature (DT), and the amount of nitrogen fertilizer (N) on the infection of rice blast were studied under the growth chambers. The sequence of contribution of variance of these factors was DP > DT > N > DP×DT > DT×N > DP×N > DP×DT×N. The optimal condition of DP, DT and N were suggested. The conception of infection probability was firstly introduced into rice blast, which was quantitively described with ?=.2328-.1266×N+.0008×N×DT×DP+8184.27×N]×DP]×DT]-986.87×DP]×DT]+139379×(DP]×DT])~2+. 0131×(3.4×DT-19.8), in which] is the eqivalence value of corresponding factor.