[题目]利用温室大棚栽培蔬菜.瓜果等农作物已成为现代农业的基本模式.下列是温室大棚栽培经常采取的措施.其中不是通过增强光合作用速率实现的是( )A．给农作物增施氮肥B．大棚栽培的农作物通过增施农家肥料补充CO2C．给农作物补充适宜强度的人工光照D．夜间适当降低农作物的环境温度题目和参考答案——青夏教育精英家教网—

【题目】利用温室大棚栽培蔬菜、瓜果等农作物已成为现代农业的基本模式。下列是温室大棚栽培经常采取的措施，其中不是通过增强光合作用速率实现的是（）

A．给农作物增施氮肥

B．大棚栽培的农作物通过增施农家肥料补充CO2

C．给农作物补充适宜强度的人工光照

D．夜间适当降低农作物的环境温度

【答案】D

【解析】给农作物增施氮肥能增强光合作用速率；大棚栽培的农作物通过增施农家肥料补充CO2，为光合作用提供原料，从而增强了光合作用速率；给农作物补充适宜强度的人工光照也是通过增强光合作用速率来实现增产的；夜间适当降低农作物的环境温度，导致酶活性降低，从而减少呼吸作用对有机物的消耗，最终达到增产的目的，可见该措施是通过减弱呼吸作用速率而实现增产的。

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