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采用田间试验的方法,在不同灌水条件下,研究吉林省西部半干旱区春玉米植株性状、水分利用特性、茎秆强度与植株性状的关系。结果表明:随着灌水量的增加,玉米株高增加,穗位高和茎秆强度有所增加,对茎粗的影响相对较小。干旱胁迫下适度灌水,玉米的茎秆强度和株高、茎粗及穗位高呈正相关关系;在灌水量达田间持水量100%的处理下,玉米的茎秆强度和株高、茎粗及穗位高呈负相关,即玉米的茎秆强度随株高和穗位高的增加而呈降低趋势,从而增加了倒伏的风险。随着灌水量的增多,玉米产量提高不明显,水分利用效率显著降低。
Field experiment was conducted to study the relationship between plant characters, water use characteristics, stalk strength and plant characters of spring maize in the semiarid areas of western Jilin Province under different irrigation conditions. The results showed that with the increase of irrigation amount, plant height increased, ear height increased and stalk strength increased, but the effect on stem diameter was relatively small. Under moderate drought stress, the stem intensity of maize had a positive correlation with plant height, stem diameter and ear height. Under the condition of 100% irrigation capacity, the stalk strength, plant height, stem diameter, The spike height was negatively correlated, ie, the stalk strength of maize decreased with the increase of plant height and ear height, which increased the risk of lodging. With the increase of irrigation amount, the yield of maize increased insignificantly and the water use efficiency decreased significantly.