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Effect of fertilization on the yield of mixed grassland(Medicago+Bromus inermis)
Author(s): ZHANG Yong-liang, LUO Xiu-mei, GAO Kai
Pages: 6-
10
Year: 2008
Issue:
5
Journal: GRASSLAND AND TURF
Keyword: 施肥; 苜蓿; 无芒雀麦; 产量;
Abstract: 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%.
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