施肥对饲草高粱生长及营养品质的影响  

Effect of fertilizer application on nutritive quality and growth of hybrid sorghum grass

作　　者：周怀平[1] 郝保平[1] 关春林[1] 解文艳[1] 

机构地区：[1]山西省农业科学院土壤肥料研究所,太原030031

出　　处：《中国生态农业学报》2009年第1期60-63,共4页Chinese Journal of Eco-Agriculture

基　　金：国家高技术研究发展计划(863计划)项目(2002AA2Z4311);山西省农业科学院新产品研制课题(YCP0502)资助

摘　　要：研究施用氮、磷、钾肥对饲草高粱生长及营养品质动态的影响结果表明,氮肥、磷肥和钾肥配合施用可大幅提高饲草高粱生物产量,增加饲草高粱植株粗蛋白质、粗纤维和粗脂肪的单位面积产出量;氮素是影响高粱生物产量的首要养分因素,其次为磷素,第三是钾素;饲草高粱植株高度以及粗蛋白质、粗纤维和粗脂肪含量的变化规律,主要取决于品种特性;施肥主要通过影响饲草高粱生物产量,对饲草高粱植株粗蛋白质、粗纤维和粗脂肪的单位面积产出量产生作用。从饲草高粱的生物产量和品质综合考虑,确定饲草高粱的适宜收割期,以开花末期至成熟中期之间为宜,过早收割饲草高粱生物产量较低,过晚收割则饲草高粱生物产量较低且品质变劣。The study on effect of fertilizer application on nutritive quality and growth of hybrid sorghum grass shows that application of mixed NPK fertilizer not only improves hybrid sorghum grass biomass but also increases its output per unit area in terms of crude protein, crude fiber and crude fat. Among the factors influencing biomass production, the N produces the best effect followed by P and K. Plant height and variability of crude protein, crude fiber and crude fat contents mainly depend on variety characteristics. Fertilizer application impacts output per unit area of crude protein, crude fiber and crude fat mainly through biomass variation in hybrid sorghum grass. With regard biomass amount and quality of hybrid sorghum grass, optimum harvesting time is from post floral stage to intermediate maturity stage. If hybrid sorghum grass is harvested early or late, its biologic yield drops. The quality is much inferior at late harvesting.

关 键 词：施肥 饲草高粱 营养品质 适宜收获时间 

分 类 号：Q945.79[生物学—植物学] S540.106[农业科学—作物学]