论文部分内容阅读
针对夏玉米高产群体密度大,拔节期雨热同期生长迅速易倒伏等高产限制因子,通过调控内源激素水平,降低穗位,健壮茎秆,实现对夏玉米形态抗倒指标和产量构成指标的综合调控,实现密植条件下的高产,为夏玉米配套技术体系提供科学依据。6叶期叶面喷施膦酸胆碱合剂(商品名:康丰利)。通过试验得出结论:喷施康丰利能缩短节间长度,降低株高和穗位高,基部第3节间直茎粗于喷清水的处理,增加后期叶片保绿性。穗粒数和千粒质量呈现出与密度水平反相关趋势,密度越大穗粒数越少、千粒质量越低。化控与不化控产量都呈现出同一个趋势,6 000株以下时随密度的增加递增,6 000株时产量达到最高,高于6 000株时产量下降。经方差分析:喷施康丰利的化控处理与喷清水处理间产量差异不显著;6 000株/667 m2与7 000株/667 m2、5 000株/667 m2、4 000株/667 m2、3 000株/667 m2之间差异极显著,7 000株/667 m2与5 000株/667 m2之间差异不显著,7 000株/667 m2与4 000/667 m2、3 000株/667 m2间达极显著水平,5 000株/667 m2与4 000株/667 m2之间差异显著,与3 000株/667 m2间达极显著水平,4 000株/667 m2与3 000株/667 m2之间差异极显。最佳种植密度为6 000株。
In view of the high yield population density of summer maize and rapid high yield limiting factors such as rapid growth of rain and heat at jointing stage, the indicators of lodging resistance and yield composition of summer maize were achieved by regulating endogenous hormones, reducing ear position and robust stalk, Comprehensive regulation and control, to achieve high yield under close planting conditions, to provide a scientific basis for the summer corn supporting technology system. 6 leaf stage foliar spray phosphonate choline (trade name: Kang Feng Li). The results showed that spraying Kangfengli could shorten the length of internodes, reduce the plant height and ear height, and the thick stems were thicker than that of clear water in the third internode, which increased the greenness of later leaves. The grain number per spike and the one-thousand grain quality showed the inverse correlation with the density level. The larger the density, the smaller the number of grains per spike and the lower the quality of 1000-grain. Both chemical control and non-control production showed the same trend. When the density was less than 6000, the yield increased with the increase of density. The output of 6 000 plants reached the highest level, while the output of 6 000 plants decreased. The analysis of variance showed that there was no significant difference between the chemical control and spraying water treatments when spraying Kangfengli; the yield was 6 000 plants / 667 m2 and 7 000 plants / 667 m2, 5 000 plants / 667 m2, 4000 plants / 667 m2, 000/667 m2. The difference was not significant between 7 000 plants / 667 m2 and 5000 plants / 667 m2. There were no significant differences between 7 000 plants / 667 m2 and 4 000/667 m2, 3000 plants / 667 m2 Reached the extremely significant level. The difference between 5 000 plants / 667 m2 and 4 000 plants / 667 m2 was significant, reaching the extremely significant level with 3 000 plants / 667 m2, 4 000 plants / 667 m2 and 3 000 plants / 667 m2 Very significant difference between. The optimum planting density is 6 000 plants.