论文部分内容阅读
以平展型传统品种酒单4号和紧凑型高产品种先玉335为试验材料,设半膜平覆(HM)、全膜双垄沟(DFM)两种覆膜方式和4.5万、9.0万株/hm~2两种种植密度,研究黄土旱塬区不同栽培模式下不同类型春玉米对土壤水分变化及对春玉米产量的影响。结果表明,品种和不同栽培模式互作效应对春玉米产量有显著影响。春玉米生育关键期降水对各处理收获土壤水分影响明显,降水不能满足春玉米生长发育需要时,春玉米会对60 cm土层以下水分产生透支性消耗,遇到连续干旱年份,则会导致春玉米60~160 cm主要根区土壤含水量降低。在相同覆膜及品种条件下,随种植密度增加,玉米产量显著增加;相同密度及品种条件下,DFM覆膜产量优于HM覆膜;相同密度及覆膜方式下,紧凑型高产品种产量较平展型传统品种显著增加。DFM覆膜和紧凑型高产品种在9.0万株/hm~2种植密度下有较高产量。
Taking the plain traditional variety wine list No. 4 and the compact high-yielding variety Xiangyu 335 as the experimental materials, two types of film covering methods of semi-film flattening (HM) and full film double furrow pattern (DFM) and 45,000 and 90,000 / hm ~ 2 were used to study the effects of different types of spring maize on soil water content and yield of spring maize under different cultivation modes in the Loess Plateau. The results showed that the interaction effects of varieties and different cultivation modes had a significant effect on the yield of spring maize. The critical period of spring maize fertilization has significant effect on the harvesting of soil moisture. When precipitation can not meet the needs of spring maize growth and development, spring corn will have an overdrawn consumption of water below 60 cm soil layer. When it encounters successive years of drought, The main root area of 60 ~ 160 cm maize soil moisture content decreased. Under the same mulching and variety conditions, the yield of maize increased significantly with the increase of planting density. The yield of DFM mulching film was better than that of HM mulching under the same density and varieties. Under the same density and film mulching, the yield of compact high-yielding varieties Flat-type traditional varieties increased significantly. DFM laminates and compact high-yield varieties have higher yields at 90,000 plants / hm ~ 2 planting density.