土壤耕作深度对旱地冬小麦生长和水分利用的影响

为提高旱地中低产田不同耕层养分和降水的利用率,在禹州市旱作农业区开展了不同耕层深度(0、10 cm、20 cm、30 cm)对小麦生长和增产效应的影响研究.结果表明,与铁茬播种相比,随着耕层深度增加,小麦春季群体增加72.0万～184.5万株/hm2,单株次生根增加5.0～20.7条,叶面积系数增加0.3～1.8.同时...

Effects of Tillage Depth on Winter Wheat Growth and Water Use in Dry Land

To improve the topsoil nutrient and precipitation utilization in the mid-low-yielding fields in dry land,the effect of different topsoil depths(0,10 cm,20 cm,30 cm)on wheat growth and yield was studied in dry farming area in Yuzhou.The results showed that the wheat group in spring increased by 7.20×105-1.845×106 seedlings/ha with topsoil depth increased,the secon-dary roots increased by 5.0-20.7 pieces per plant,and the index of leaf area increased by 0.3-1.8.And the maturity extended 3-7 d.Therefore,the production factors and yield were in-fluenced positively:the panicles increased by 2.4×105-6.3×105 per hectare,the number of grains increased by 2.1-8.2,the 1000-grain weight increased by 1.2-5.9 g,and the yield of winter wheat increased by 16.2%-52.5%.The efficiency of precipitation utilization was increased by 1.43-4.65 kg/(mm·ha),and the best one was under the treatment of 30 cm tillage depth.In conclusion,deep plowing could improve soil water storage capacity and improve the yield and the efficiency of precipitation utilization.