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为了充分利用盐碱土地,提高盐碱土地的产出率,试验采用4个氮肥水平,在轻度盐碱地对3个不同青贮玉米品种的青物质产量、干物质产量、粗蛋白、中性洗涤纤维和酸性洗涤纤维含量进行测定。结果表明:青物质产量、干物质产量、中性洗涤纤维和酸性洗涤纤维含量均随氮肥水平的增加呈现先升高后下降的趋势,综合青物质产量和粗饲料分级指数(GI)得出,在轻度盐碱地条件下中原单32青贮玉米的N肥水平设在N_2处理下,即施N量为138 kg/hm~2,龙巡32青贮玉米和中北410青贮玉米的N肥水平设在N3处理下,即施N量为207 kg/hm~2。
In order to make full use of saline-alkali land and increase the yield of saline-alkali soil, four nitrogenous fertilizers were used to test the effects of four nitrogen fertilizers on the yield of green matter, dry matter yield, crude protein, neutral detergent fiber And acid detergent fiber content was measured. The results showed that the yield of green matter, dry matter yield, neutral detergent fiber and acid detergent fiber all increased at first and then decreased with the increase of nitrogenous fertilizer level. The yield of green matter and the forage grading index (GI) Under mild saline-alkali conditions, the N fertilizer level of single-silage corn in Central Plains was set under N 2 treatment, ie N application rate was 138 kg / hm -2. The N fertilizer level of Longsheng 32 silage corn and North-central 410 silage corn was set at N3 Under treatment, the amount of applied N is 207 kg / hm ~ 2.