山东夏玉米土壤干旱阈值研究与影响评价

董智强,李曼华,李楠,薛晓萍,陈辰,张继波,赵红,侯英雨,潘志华

The Thresholds of Soil Drought and Its Impacts on Summer Maize in Shandong Province

DONG ZhiQiang,LI ManHua,LI Nan,XUE XiaoPing,CHEN Chen,ZHANG JiBo,ZHAO Hong,HOU YingYu,PAN ZhiHua

表3 夏玉米不同发育期干旱阈值指标确定

Table 3 The drought threshold indexes at different development stages of summer maize (%)

生育时期 Growth stage 干旱程度 Degree of drought 阈值指标 Threshold indexes 苗期 Seedling stage 无旱No drought 53 轻旱Light drought 50 中旱Medium drought 45 重旱Severe drought 40 穗期 Ear stage 无旱No drought 58 轻旱Light drought 48 中旱Medium drought 43 重旱Severe drought 37 花粒期 Grain stage 无旱No drought 57 轻旱Light drought 52 中旱Medium drought 49 重旱Severe drought 45