Agri521'Blog

今年7月份，APSIM Group主题帖有11篇，其中4篇没有被回复。求助关于模型算法的有8篇，涉及到蒸腾效率、高粱品种参数、农场污水降解模型等；关于APSIM脚本或应用的有3篇，涉及到组件增加等问题。在被回复的8篇中，有2篇得到满意答案，见下：

2010/06/29

问：APSIM是否包括西红柿模型？答：没有

2010/07/03

问：于播种后，间隔一定天数追施肥料，这种施氮方式是否可以模拟？
答：
It is a top up rule meaning that it will determine the amount to apply to keep the amount of N at a threshold (the value specified on the line “Amount of N required in top 3 layers (kg/ha) : “).

请复制以下内容，粘贴到paddock节点。这样模拟树就增加了新组件，该组件可以实现设置施肥料和间隔天数。
<manager name=”Fertilise on days after sowing”>
<script>
<text><![CDATA[
if ([modulename].DaysAfterSowing = [fert_das]) then
[fertmodule] apply amount = [fert_amount] (kg/ha), depth = 50 (mm), type = [fert_type] ()
endif ]]></text>
<event>start_of_day</event>
</script>
<ui>
<category name=”When should fertiliser be applied” />
<modulename type=”modulename” description=”On which crop is fertiliser being applied:”>wheat</modulename>
<fert_das type=”text” description=”Enter number of days after sowing:”>20</fert_das>
<category name=”Fertiliser application details” />
<fertmodule type=”modulename” description=”Module used to apply the fertiliser:” />
<fert_amount type=”text” description=”Amount of fertiliser to apply (kg/ha):”>150</fert_amount>
<fert_type type=”list” listvalues=”NO3_N, NH4_N, NH4NO3, urea_N, urea_no3, urea, nh4so4_n, rock_p, banded_p, broadcast_p” description=”Fertiliser type:”>urea_N</fert_type>
</ui>
</manager>