Using a process-oriented methodology to precisely evaluate temperature suitability for pot

Using a process-oriented methodology to precisely evaluate temperature suitability for potato growth

in China using GlS

HE Ying-bin;ZHOU Yang-fan;CAI Wei-min;WANG Zhuo-zhuo;DUAN Ding-ding;LUO Shan-jun;CHEN Jing-zhu

【期刊名称】《农业科学学报（英文版）》

【年(卷),期】2017(016)007

【摘要】A process-oriented methodology to conduct precise evaluation temporally and spatially on temperature suitability for potato growth was applied in China. Arable lands in China were gridded with 1 km×1 km geographic units, and potential potato phenology in each unit was automatically identified in terms of the potato planting initial temperature and effective accumulated temperature. A temperature thermal response coefficient model was used to compute a temperature suitability value for each day of potato phenology in each geographic unit. In addition, five temperature suitability ranking methods were applied to define suitable areas: (1) upper fourth quantile, (2) median, (3) expected value+1/4 standard deviation, (4) expected value+1/2 standard deviation, (5) expected value+1 standard deviation. A validation indicator was innovated to test the effectiveness of the five ranking methods. The results showed that from a strict degree point of view, the five methods sequence was as follows: 1=3>4>2>5, with a