山东夏玉米土壤干旱阈值研究与影响评价
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董智强,李曼华,李楠,薛晓萍,陈辰,张继波,赵红,侯英雨,潘志华
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The Thresholds of Soil Drought and Its Impacts on Summer Maize in Shandong Province
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DONG ZhiQiang,LI ManHua,LI Nan,XUE XiaoPing,CHEN Chen,ZHANG JiBo,ZHAO Hong,HOU YingYu,PAN ZhiHua
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表5 苗期轻旱、中旱与重旱不同持续天数的各指标变化程度
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Table 5 The variation degree of each index of light drought, medium drought and severe drought with different duration days at seedling stage of summer maize (%)
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干旱程度
Drought degree | 干旱持续时间
Duration days of drought | TAGP | TWSO | TWLV | TWST | MAXLAI | 轻旱
Light drought | 3 d | -3.2 | -2.9 | -3.9 | -3.7 | -3.0 | | 5 d | -3.7 | -2.9 | -5.7 | -5.1 | -4.4 | | 10 d | -4.5 | -2.7 | -8.6 | -7.7 | -6.9 | | 15 d | -6.1 | -2.7 | -13.8 | -12.2 | -11.3 | | 20 d | -8.5 | -3.0 | -20.7 | -18.4 | -17.6 | 中旱
Medium drought | 3 d | -1.7 | 0.1 | -5.7 | -4.8 | -3.9 | | 5 d | -3.0 | 0.0 | -9.6 | -8.2 | -7.2 | | 10 d | -5.9 | -0.5 | -17.7 | -15.3 | -14.5 | | 15 d | -10.4 | -2.2 | -28.5 | -25.1 | -24.7 | | 20 d | -17.0 | -6.1 | -40.8 | -36.6 | -37.1 | 重旱
Severe drought | 3 d | -2.4 | 0.0 | -7.8 | -6.7 | -5.5 | | 5 d | -4.5 | -0.2 | -14.1 | -12.1 | -11.1 | | 10 d | -10.0 | -1.9 | -27.6 | -24.3 | -23.9 | | 15 d | -18.7 | -7.2 | -43.6 | -39.2 | -39.7 | | 20 d | -31.8 | -18.8 | -60.1 | -55.3 | -56.8 |
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