施肥对无芒雀麦+杂花苜蓿混播草地组分种产量的影响  

Effect of fertilization on the yield of individual species of perennial grass/legume mixed grassland community

作　　者：张永亮[1] 郑春芳[1] 胡自治[2] 

机构地区：[1]内蒙古民族大学农学院,内蒙古通辽028042 [2]甘肃农业大学草业学院,甘肃兰州730070

出　　处：《草原与草坪》2004年第4期33-38,共6页Grassland and Turf

基　　金：农业部科研项目"营养体农业的研究"(031042)

摘　　要：探讨了科尔沁沙地Carton无芒雀麦+草原2号杂花苜蓿混播草地建植时,基肥中N,P和K配比对当年草地群落组分种产量及总产量的影响。结果表明,N,P和K合理配比均有利于杂花苜蓿和无芒雀麦早期生长。在施肥效应中,杂花苜蓿与P肥效应最显著,无芒雀麦与N肥效应最显著。高K组合(K2O180kg/hm2、P2O5572kg/hm2、、N90kg/hm2)可显著提高无芒雀麦产量及其在草群中的比例(P<0.01),而高K组合与高N组合(N135kg/hm2、K2O120kg/hm2、P2O572kg/hm2、)显著降低了杂花苜蓿头茬草的产量(P<0.05)。基肥中N对2茬草产量影响已不显著,P肥仍有利于2茬草中苜蓿生长,但产量差异不显著,只有高K组合对无芒雀麦产量影响仍然显著(P<0.01)。在混播草地中,播种时适宜的施肥量为纯N90kg/hm2,K2O120kg/hm2和P2O572kg/hm2、。The effects of N, P and K fertilizers on the yield of individual species of one-year old perennial grass/legume mixed grassland community under different application rates were studied in Inner Mongolia. The results indicated that the proper fertilization could improve the seedling growth of Bromus inermis and Medicago varia Martin.cv.Caoyuan NO.2. The impact of P fertilizer on Medicago was the most significant and meanwhile N fertilizer on Bromus inermis.High-level K fertilization (K_(2)O 180 kg/hm^2, P_(2)O_(5) 572 kg/hm^2, N 90 (kg/hm^2)) could significantly increase the yield of grass. High-level K and N fertilization (N 135 kg/hm^2,^( )K_(2)O 120 kg/hm^2, P_(2)O_(5 ) 72 kg/hm^2) significantly reduced the first clipping yield of Medicago (P<0.05). Effect of N in the base fertilizer was not remarkable to the second clipping yield. However, P fertilizer was still beneficial to the regrowth of Medicago, although its effect was not significant. The proper application rate should be N 90 kg/hm^2, K_(2)O 120 kg/hm^2, P_(2)O_(5) 72 kg/hm^2.

关 键 词：科尔沁地区 Carton无芒雀麦 草原2号杂花苜蓿 混播草地 施肥 种间竞争 

分 类 号：S147.22[农业科学—肥料学]