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Improvement of Understory Vegetation by Seeding of Herbage Plants in a Wasted Mulberry Plantation under Cattle Grazing

机译:牧草牧草中牧草植物栽培植被的改善

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Our previous study conducted in a wasted mulberry plantation showed significant decline of leaf productivity of mulberry (Morus sp.) by cattle grazing in three years (Ogura et al., 2009). This means that improvement of understory vegetation is essential to use such wasted areas as grazing lands. In this study, the mixture of seeds (Dactylis glomerata, Lolium perenne, Poa pratensis and Trifolium repens, 15∶15∶5∶2) was seeded on 18 Sep. 2007, in nine experimental plots (6 m ×6 m each) with different seeding rates (L: 37 kg/ha, M: 56kg/ha and H: 74kg/ha, three replications) in the wasted mulberry plantation described in the previous paper (paddock A) (Ogura et al., 2009). Two cows were grazed in the paddock for 42 and 54 days in 2007 and 2008, respectively. No fertilizer nor herbicides were applied in the paddock. The coverage of the sown species and weeds, and the proportion of bare area were recorded on 19 Sep. 2007, 16 Nov. 2007, 21 May 2008 and 21 May 2009. T. repens rapidly covered the understory; the coverage ranged 49.4-71.7% in 2008-2009 (Fig. 1). D. glomerata and L. perenne also increased to 10.6-18.3% and 20.633.9% in 2009, respectively, regardless to the seeding rates. In contrast, the proportion of bare area rapidly decreased. The quick establishment of the sown plants probably due that defoliation and trampling of cows suppressed the growth of native plants. In conclusion, the seeding rate of 3.7 kg/ha is sufficient to establish herbage plants in wasted mulberry plantations under cattle grazing.
机译:我们以前在浪费的桑树种植园进行的研究表明,在三年内养牛(Ogura等,2009),养粉的叶片生产率(Morus SP)的叶片生产率显着下降(Ogura等,2009)。这意味着改善林下植被对于使用这种浪费的地区是放牧土地的必然。在这项研究中,在2007年9月18日,种子(Dactylis Glomerata,Lolium Perenne,PoA Pratensis,Poa Pratensis和Trifolium repens,15:15:5:2),在九个实验图(每次6米×6米)在上一篇论文(Paddock A)中描述的浪费的桑树种植园中,不同的播种率(L:37 kg / ha,m:56kg / ha和h:74kg / ha,三种复制)(Ogura等,2009)。在2007年和2008年分别在围场撒上围场42和54天的两头奶牛。在围场中没有施肥或除草剂。播种物种和杂草的覆盖范围,赤裸地区的比例于2007年9月19日,2007年11月16日,2008年5月21日和2009年5月21日.T.豁免迅速涵盖了林分覆盖物;覆盖范围在2008-2009(图1)范围为49.4-71.7%。 D.Glomerata和L. Perenne分别增加到2009年的10.6-18.3%和20.633.9%,无论种子率如何。相比之下,裸区域的比例迅速下降。播种植物的快速建立可能是由于牛的脱落和践踏抑制了原生植物的生长。总之,3.7千克/公顷的播种率足以建立饲料造成的牧草种植园的牧草植物。

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