摘要
文章旨在研究不同种植密度对青贮玉米生长、产量及经济效益的影响,为青贮玉米推广种植提供数据参考.青贮玉米品种选择适宜甘肃本地种植的陇青贮 2 号,在相同水肥管理条件下,分别设置低(6.75×104 株/hm2)、中(7.50×104 株/hm2)、高(8.25×104 株/hm2)3 个种植密度组,以小区测样方式,统计青贮玉米(乳熟后期至蜡熟前期)的生长、产量及经济效益情况.结果表明:(1)随着种植密度的提高,青贮玉米平均株高和平均叶片数呈下降趋势(P＜0.10),与低种植密度组(6.75×104 株/hm2)相比,高种植密度组(8.25×104 株/hm2)青贮玉米平均穗位高和倒伏率显著提高 3.00%、57.06%(P＜0.05),平均茎粗显著降低 12.19%(P＜0.05).(2)不同种植密度对青贮玉米产量各项指标均无显著差异(P＞0.05).(3)在经济效益方面,低、中、高种植密度组青贮玉米毛利分别为 51898.77、56723.45、56497.11 元/hm2.结论:综合对比各项指标,陇青贮 2 号青贮玉米适宜种植密度为 7.50×104 株/hm2.
Abstract
To study the effects of different planting densities on the growth,yield,and economic benefits of silage corn,and to provide data reference for the promotion and planting of silage corn.Select Longqing No.2 silage Corn,which is suitable for local cultivation in Gansu,for silage corn.Under the same water and fertilizer management conditions,set low(6.75×104 plants/hm2),medium(7.50×104 plants/hm2),height(8.25×104 plants/hm2)were planted in three density groups,and the growth,yield,and economic benefits of silage corn(from late milk ripening to early wax ripening)were measured using a plot sampling method.The results showed that,(1)With the increase of planting density,the average plant height and average leaf number of silage corn showed a decreasing trend(P＜0.10),compared to the low planting density group(6.75×104 plants/hm2),the high planting density group(8.25×104 plants/hm2).The average ear height and lodging rate of silage corn increased by 3.00%and 57.06%(P＜0.05),while the average stem diameter decreased by 12.19%(P＜0.05).(2)There was no significant difference in yield indicators of silage corn among different planting densities(P＞0.05).(3)In terms of economic benefits,the gross profit of silage corn in the low,medium,and high planting density groups was 51898.77 yuan/hm2,56723.45 yuan/hm2,and 56497.11 yuan/hm2,respectively.Conclusion:By comprehensively comparing various indicators,the suitable planting density for Longqing No.2 silage Corn is 7.50×104 plants/hm2.
基金项目
甘肃省中青年科技基金(20JR5RE636)
甘肃省科技成果重点推广计划(20CX9NH172)
甘肃省青年科技基金(21JR7RH892)
武威市民生科技计划(WW2202MSX016)
武威市科技计划(ww23B02NY144)
武威市科技计划(ww23B02NY199)
NETL
NSTL
万方数据