摘要
为研究玉米群体干物质、产量、养分吸收转运对钾素的响应.于2018-2019年在宁夏银川平吉堡开展田间试验,设6个钾肥用量,依次为0、60、120、180、240、300kg/hm2.结果表明:施钾显著提高了玉米干物质积累、钾素吸收转运及利用效率,以施钾量为180 kg/hm2条件下最好,成熟期干物质积累量较对照提高了 3.04％～13.80％,穗钾素积累量较对照提高32.17％～42.57％.施钾处理下钾素转运量提高了 20.28％～68.73％,钾转运率提高了 10.16％～30.37％,转运养分对籽粒贡献率提高了 20.40％～67.71％.180 kg/hm2较其他施钾处理,钾素吸收利用效率提高了 20.09％～247.97％,钾素农学利用率提高了37.47％～221.27％,产量提高了 6.99％～18.14％.综合考虑玉米产量、养分积累与转运及肥料利用等因素,本试验条件下以施钾量为180 kg/hm2较为适宜.
Abstract
To study the response of maize population dry matter,yield,nutrient absorption and transport to potassium,a field experiment was conducted in Pingjibao,Yinchuan City,Ningxia from 2018 to 2019,with 6 potassium fertilizer dosages of 0,60,120,180,240 and 300 kg/hm2.The results showed that potassium application significantly improved the dry matter accumulation,potassium absorption,transportation and utilization efficiency of corn.The best potassium application rate was 180 kg/hm2,and the dry matter accumulation in the mature stage increased by 3.04％to 13.80％compared to the control,while the potassium accumulation in the ear increased by 32.17％to 42.57％compared to the control.Under potassium application,the potassium transport amount increased by 20.28％-68.73％,the potassium transport rate increased by 10.16％-30.37％,and the contribution rate of transported nutrients to grains increased by 20.40％-67.71％.Compared with other potassium application treatments,the potassium absorption and utilization efficiency of 180 kg/hm2 increased by 20.09％-247.97％,the potassium agronomic utilization efficiency increased by 37.47％-221.27％,and the yield increased by 6.99％-18.14％.Taking into account factors such as corn yield,nutrient accumulation and transportation,and fertilizer utilization,the potassium application rate of 180 kg/hm2 was more suitable under the experimental conditions
基金项目
宁夏回族自治区自然科学基金(2021AAC03072)
宁夏回族自治区区重点研发项目(2019BBF02003)
宁夏高质量发展与生态保护科技创新示范项目(NGSB-2021-3-02)
研究生创新项目(CXXM2022-20)
国家科技期刊平台
NSTL
万方数据