栽培技术措施对青贮玉米生物产量和品质的影响*

 以云南宣威当地推广品种——桥丹二号为试验材料，研究了3种密度和5个施氮水平对青贮玉米生物产量及品质的影响。结果表明，种植密度跟产量之间存在正相关关系，追肥量（尿素）对产量的影响不大。试验中在种植密度为120000株/hm²，追肥量（尿素）为75kg/hm²即可以达到高产，但无论鲜产量还是干物质产量均不是最高，只有追肥量（尿素）达到300kg/hm²时鲜产量、干物质产量才均达到最高，而且对土壤营养成分含量影响较小。种植密度的提高不利于植株粗蛋白含量的提高，追肥量的增加有利于粗蛋白、粗脂肪含量的提高，但也提高了粗纤维和粗灰分的含量；种植密度为120000株/hm²，追肥量（尿素）为300kg/hm²的处理营养价值最高。

The Impact of Cultivation Technology on Biological Yield and Quality of Silage Maize

In this paper the effects of 3 planting densities and 5 nitrogen rates on biological yield and quality of silage maize were studied by using local varieties of Qiaodan 2 as materials.The results showed that there was a positive correlation between density relations with biological yield,and the effect of the amount(urea) have little effect on biological yield.In the planting density was 120 000 plant/hm2 and the nitrogen rate was 75 kg/hm2,can achieve high yield,but whether fresh or dry matter yield was not the highest yield.When the nitrogen rate was 300 kg/hm2,Qiaodan 2 reached the highest biological yield and nutrient content of the soil was less affected.Plant density is not conducive to the improvement of CP content,seedling fertilizer conducive to the increase of CP and EE content,but also increased the CF and crude ash content.And In the planting density was 120 000 plant/hm2,the nitrogen rate was 300 kg/hm2 silage maize could achieve the highest nutritional value.