施肥对苜蓿+无芒雀麦混播草地的产量影响  

Effect of fertilization on the yield of mixed grassland (Medicago+Bromus inermis)

作　　者：张永亮[1] 骆秀梅[2] 高凯[1] 

机构地区：[1]内蒙古民族大学农学院,内蒙古通辽028042 [2]内蒙古民族大学教科院,内蒙古通辽028042

出　　处：《草原与草坪》2008年第5期6-10,共5页Grassland and Turf

基　　金：内蒙古自然科学基金项目(20050810416)资助

摘　　要：探讨了科尔沁地区草原2号杂花苜蓿+Carlton无芒雀麦混播草地基肥和追肥中氮,磷和钾配施对草地群落产量的影响。结果表明,氮,磷和钾合理配施有利于草原2号苜蓿和无芒雀麦生长。在配施中,草原2号苜蓿与磷肥效应最显著,无芒雀麦与氮肥和钾肥效应最显著。高钾组合与高氮组合显著降低了草原2号苜蓿产量(P<0.05)。对于春播的杂花苜蓿+无芒雀麦混播草地,为了保持混播群落组分种群的稳定性,较适宜的施肥组合是N2、P1、K2组合(基肥:尿素20 g/m2、过磷酸钙30 g/m2、氯化钾20 g/m2;追肥:尿素30 g/m2、过磷酸钙50 g/m2、氯化钾30 g/m2)。一年龄草地头茬草和二茬草中无芒雀麦产量组分比分别为44.47%和71.10%,占全年总产量的63.62%。二年龄草地三茬草中无芒雀麦产量组分比分别为39.23%,59.73%和37.76%,占全年总产量的46.64%。The effects of N,P and K fertilizers on the yield of Medicago＋ Bromus inermis mixed grassland under different application rates were studied in Inner Mongolia. The results indicated that the proper fertilization could improve the growth of Brornus inermis and Medicago varia cv. Caoyuan No. 2. P fertilizer showed the best effect on Medicago and meanwhile N fertilizer on Bromus inermis. High level of K and N application significantly reduced the first clipping yield of Medicago （P〈0. 05）. The appropriate fertilizer application combination for stable community was N2, P1 , K2 Formula （basic fertilizer： carbamide 20 g/m^2, ordinary superphosphate 30 g/m^2 and potassium chloride 20 g/m^2 ;supplemental fertilizer： carbamide 30 g/m^2 ,ordinary superphosphate 50 g/m^2 and potassium chloride 30 g/m^2）. In the first year, the grass yields of Bromus inermis from first clipping and second clipping accounted for 44.47% and 71.1% of the community,and which was 63.62% of total yield. In the second year,the grass yield of Bromus inerrnis from three clippings accounted for 39.23% ,59.73% and 37.76% of the community,and which was 46.64% of total yield.

关 键 词：施肥 苜蓿 无芒雀麦 产量 

分 类 号：S540.6[农业科学—作物学]