| 根据传播梯度模型预测传播距离的初步探讨 |
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| 引用本文： | 曾士迈.根据传播梯度模型预测传播距离的初步探讨[J].植物病理学报,1985,15(2):95-102. |
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| 作者姓名： | 曾士迈 |
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| 作者单位： | 北京农业大学 |
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| 摘 要： | 当传播后新发病总量Z和梯度系数b可经预测面得知时,小麦条锈病之类的气传叶部病害的一次传播距离可以利用梯度模型Xi=a·d-b而导出。其中,还需先根据Z、b等已知项推导出a值。本文推导了三种方法以预测传播距离,并用田间实测数据进行了检验。初步认为:"中心区病情法"可能较为实用。这些方法的合理性和可靠性尚待进一步检验。
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PRELIMINARY STUDY ON THE PREDICTION OF DISTANCE OF DISEASE SPREAD BASED ON THE INFECTION GRADIENT MODEL |
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| Zeng Shimai.PRELIMINARY STUDY ON THE PREDICTION OF DISTANCE OF DISEASE SPREAD BASED ON THE INFECTION GRADIENT MODEL[J].Acta Phytopathologica Sinica,1985,15(2):95-102. |
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| Authors: | Zeng Shimai |
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| Institution: | Department of Plant Protection, Beijing Agricultural University |
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| Abstract: | In air-borne diseases,such as wheat stripe rust,distance of disease spread brought about by one cycle of infection can be predicted through the infection gradient model Xi=a·di-b,provided Z,the total amount of disease resulted from the infection,and b,the gradient coefficient,can be predicted and thereafter "a" can he estimated,Three approaches to the prediction were designed and tested with observed values of disease spread.Among the three,the "center square" approach seems to be the most hopeful.Further works of verification and validation are needed. |
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