微量元素对黑麦草产量和品质的影响

在N、P、K肥料的基础上,采用Fe、Cu、Zn、Mn、B、Mo 6种微肥对黑麦草Lolium multiflorum进行叶面喷施，研究不同用量对黑麦草产量和品质的影响。试验表明：喷施Fe 0.05%、Cu 0.07%、Zn 0.40%、Mn 0.10%、B 0.60% 和Mo 0.20%与对照组相比增产差异显著（P＜0.05）。适度的Fe、Cu、Mn、B和Mo能提高黑麦草的粗蛋白、粗纤维和粗灰分含量，粗蛋白提高3.72%～6.67%，无氮浸出物含量呈降低趋势，喷施Zn肥降低了粗蛋白含量，喷施B肥提高了粗脂肪含量。黑麦草中Cu、B、Mo的含量随喷肥量的提高而增加，喷施Cu 0.1%、B 1%和Mo 0.3%时，黑麦草中的含量最高，与对照组差异显著（P＜0.05）。喷施Zn 0.40%、Mn 0.1%、Fe 0.05%时牧草中相应的微量元素最高，与对照组差异显著（P＜0.05）。

Effect of different trace elements on yield and quality of ryegrass

Based on the ample N,P and K fertilizer, fertilizer containing trace element Fe、Cu、Zn、Mn、B and Mo was sprayed on growing ryegrass in order to study the different trace elements and application rates on yield and quality of the ryegrass. The results showed that spraying Fe（0.05%）、Cu（0.07%）、Zn（0.40%）、Mn（0.10%）、B（0.60%）and Mo（0.20%）raised the ryegrass yield significantly(P＜0.05). Suitable Fe、Cu、Mn、B and Mo trace element fertilizers could improve the content of crude protein (by 3.72%～6.67%)、crude fiber(CF) and ash; Nitrogen free extract (NFE) content tended to decline. The trace element fertilizer of ZnSO4·7H2O reduced the content of CP，while H3BO3 increased EE content. In addition, the content of Fe、Cu、Zn 、Mn、B and Mo in the ryegrass increased with the increasing application rates; significant difference was observed when 0.1% Cu, 1% B, 0.3% Mo, 0.40% Zn, 0.1% Mn, 0.05% Fe were sprayed（P＜0.05).