摘要
为明确不同种植密度和尿素施用量水平对巨菌草(Pennisetum giganteum)生长及产量形成的影响,为巨菌草在矿区推广种植提供科学依据,本文以鄂尔多斯市满来梁煤矿矿山复垦地种植巨菌草为试验材料,研究了不同种植密度(60cm×80cm、60 cm×120cm、80cm×100cm、100 cm×120 cm)和不同尿素施用量[F1(375 kg/hm2)、F2(450 kg/hm2)、F3(525 kg/hm2)、F4(600 kg/hm2)、F5(675 kg/hm2)、F6(750kg/hm2)]对巨菌草各指标的影响.结果表明:①种植密度为100cm×120 cm时,巨菌草分蘖期和拔节期的单株长势较好,在分蘖期末和拔节期末的株高分别为63.0 cm和244.8 cm,而密度为60 cm×120 cm时巨菌草产量最高,为33.17 t/hm2;②施肥量为600 kg/hm2时,巨菌草单株长势和产量均为最佳,生长季末的平均株高和产量分别为188.5 cm和35.56t/hm2.综上,本试验条件下,巨菌草获得高产的最佳种植密度为60cm×120cm,最适施肥量为600 kg/hm2.
Abstract
In order to clarify the effects of different planting densities and urea application levels on the growth and yield formation of Pennisetum giganteum,and to provide a scientific basis for the promotion and planting of Pennisetum giganteum in the mining area,Pennisetum giganteum was planted in the reclaimed land of Manlailiang Coal Mine in Ordos City as the experimental material,and the effects of different planting densities(60 cm×80 cm,60 cm×120 cm,80 cm×100 cm,100 cm×120 cm)and different urea appli-cation rates,namely,F1(375 kg/hm2),F2(450 kg/hm2),F3(525 kg/hm2),F4(600 kg/hm2),F5(675 kg/hm2),and F6(750 kg/hm2)on the indexes of Pennisetum giganteum were studied.The results showed that,when the planting density was 100 cm×120 cm,the single plant growth of Pennisetum giganteum at tillering stage and jointing stage was better,and the plant height at the end of tillering stage and jointing stage was 63.0 cm and 244.8 cm,respectively.When the density was 60 cm×120 cm,the yield of Pennisetum gi-ganteum was the highest with the value of 33.17 t/hm2.The fertilizer application of 600 kg/hm2 resulted in the best growth and yield,and the average plant height and yield at the end of the growing season were 188.5 cm and 35.56 t/hm2,respectively.In summary,under the conditions of this experiment,the optimum planting density for high yield of Pennisetum giganteum was 60 cm×120 cm,and the optimum fertilization rate was 600 kg/hm2.
基金项目
内蒙古农业大学青年教师科研能力提升专项项目(BR230136)
鄂尔多斯市科技重大专项项目(2022EEDSKJZDZX012)
内蒙古农业大学高层次人才引进科研启动项目(NDYB2020-19)
维普
万方数据