氮、磷肥配施对青引1号燕麦产量和品质的影响

Effects of Combined Application of N and P Fertilizer on the Yield and Quality of Avena sativa cv. Qingyin No.1

为探明西藏海拔4 300m地区种植燕麦的氮、磷肥需求及其对燕麦产量和品质的影响,以青引1号燕麦为材料,在西藏拉萨墨竹工卡县斯布村进行了燕麦的氮、磷肥配施试验。结果表明:该区种植燕麦可正常成熟,生育期114~124d;施用氮、磷肥对燕麦产草量、植株高度、养分含量均影响显著。在相同施磷水平下,随着氮肥的增加,干草产量、乳熟期植株高度和粗蛋白呈现先增后减趋势,并以施氮(纯N)75kg/hm^2、磷(P_2O_5)60kg/hm^2的处理组合产量最高,为11 573kg/hm^2,比不施肥对照组增产4 718kg/hm^2,且净收益最高。粗脂肪、酸性洗涤纤维和中性洗涤纤维含量随着氮肥施用量的增加而有不同程度的降低。纯N 75kg/hm^2和P_2O_5 60kg/hm^2可作为该区草地建植的推荐施肥量。

To explore the N,P fertilizer demand and its impact on yield and quality ofAvena sativa cv. Qingyin No. 1,the experiment was carried in Sibu village Maizhokunggar county of Tibet with the altitude of 4 300m. The results showed that planting oats could mature in this area;growth period lasted 114M24d;N,P fertilizer and their interaction significantly influenced the yield,plant height and nutrient content;in the same P level,hay yield,plant height of milk-ripe stage and crude protein appeared first increased back decreased trend with N increasing;yield of combined application of N （pure N） 75kg/hm2,P （P2O5） 60kg/hm2 was 11 573kg/hm2,more than control （no fertilization） by 4 718kg/hm2,and got the highest net income;crude fat,acid detergent fiber and neutral detergent fiber content reduced to varying degrees with N increasing. N 75kg/hmZ,P2O5 60kg/hm2 was treated as the recommended application rate of oats planting in this area.