摘要
试验以“曲辰19”“禾玉9566”2个品种为试验材料,综合评价饲用玉米在西藏日喀则地区种植的生产情况,为在该区域实施大面积不覆膜种植生产提供科学依据。研究覆膜与不覆膜下株高、产量对比,并分析覆膜与不覆膜种植下的投入产出比;研究不覆膜下不同种植密度对其生产性能的影响。通过研究得出:“曲辰19”“禾玉9566”2个品种苗期覆膜区株高高于不覆膜区36.84%和33.33%,大喇叭口期覆膜区株高高于不覆膜区35.77%和21.24%,灌浆期覆膜区株高高于不覆膜区4.06%和3.36%。覆膜区2个品种的产量相比不覆膜区增加54.24%和73.88%。2个品种在覆膜下投入产出比分别为1∶5.4和1∶6.1,而不覆膜种植下的投入产出比均为1∶3.9。不覆膜下对比9.80万株/hm^(2)、8.33万株/hm^(2)、5.56万株/hm^(2)3种种植密度,“曲晨19”在5.56万株/hm^(2)密度下株高最低,茎秆最粗,绿叶片数最多,但3种密度间差异不显著(p>0.05)。“禾玉9566”在5.56万株/hm^(2)密度下的株高显著低于其他2种密度,茎粗也显著粗于其他2种密度,绿叶片数显著多于9.80万株/hm^(2)密度(p<0.05)。“曲辰19号”的鲜草产量在8.33万株/hm^(2)密度下分别高于9.80万株/hm^(2)和5.56万株/hm^(2)的2.09%和20.08%,“禾玉9566”鲜草产量在8.33万株/hm^(2)密度下分别高于9.80万株/hm^(2)和5.56万株/hm^(2)的9.20%和20.84%。2个品种在8.33万株/hm^(2)密度下的产量显著高于5.56万株/hm^(2)密度(p<0.05)。覆膜种植下能够明显提高饲用玉米产量,而且从投入产出比看,在西藏日喀则地区的覆膜种植经济效益优于不覆膜种植;在不覆膜下种植密度适宜控制在8.33万株/hm^(2)至9.80万株/hm^(2)。
‘Quchen 19’and‘Heyu 9566’were selected as the test varieties in this experiment to comprehensively evaluate the production of forage corn,and provide scientific basis for the implementation of large-scale non-film-covered planting in Shigatse Tibet.The comparison of plant height and yield under film mulching and non-film mulching were analyzed,and the effect of different density planting on its production performance under non-film mulching was studied.It was studied that for two varieties‘Quchen 19’and‘Heyu 9566’,the plant height in the film-covered area was 36.84%and 33.33%respectively,which were higher than that in the non-film-covered area at the seedling stage;At trumpet stage,the plant height in the film-covered area was 35.77%and 21.24%respectively,which were higher than that in the non-film-covered area;At filling stage,the plant height in the film-covered area was 4.06%and 3.36%respectively,which was higher than that in the non-film-covered area.The yield of the two vari⁃eties in the film-covered area increased by 54.24%and 73.88%.The input-output ratio of the two varieties under plastic film mulching is 1∶5.4 and 1∶6.1.While,the input-output ratio under non-plastic film mulching is 1∶3.9.Under the non-film mulching,comparing three different planting densi⁃ties(98000plants/hm^(2),83300 plants/hm^(2),55600 plants/hm^(2)),‘Quchen 19’has the lowest plant height,the thickest stem,and the highest number of green leaves at a density of 55600 plants/hm^(2),but the difference is not significant(p>0.05).The plant height of Heyu 9566 at a density of 55600 plants/hm^(2) was significantly lower than the other two densities,and the stem diameter was also significantly thicker than the other two densities.The green leaves number of‘Heyu 9566’at a density of 55600 plants/hm^(2) was significantly higher than the density of 98000 plants/hm^(2)(p<0.05).The fresh yield of‘Quchen 19’under the 83300 plants/hm^(2) was higher than 2.09%of 98000 plants/hm^(2) and 20.08%of 55600 plants/hm^(2
作者
曲珍
曲尼
旦增桑布
赖可
德吉
宁英林
吴海艳
平措多吉
Quzhen;Quni;Danzengsangbu;Laike;Deji;NING Yinglin;WU Haiyan;Pingcuoduoji(Shigatse Grassland Workstation,Tibet Shigatse 857000,China)
出处
《西藏农业科技》
2023年第3期23-26,共4页
Tibet Journal of Agricultural Sciences
基金
西藏日喀则市级科技项目(RKZ2020KJ09)。
关键词
饲用玉米
覆膜
种植密度
日喀则
forage corn
film covering
planting density
Shigatse
