论文部分内容阅读
为探讨不同播种量对白三叶草(Trifolium repens L.)生长、产量、越夏率以及对杂草生物量控制的影响,于2012年10月—2013年11月在幼龄杨梅园开展白三叶草不同播种量研究。结果表明:随播种量增加,白三叶草出苗数、草层高度呈上升趋势,而茎粗、叶片SPAD值和单株鲜重均呈下降趋势。白三叶草鲜草产量随播种量的增加显著增加,播种量<15.00 kg/hm~2时,增加幅度较大,处理间达显著差异,而播种量为15.00~18.75 kg/hm~2时,鲜草产量增幅减小;白三叶草种子产量和越夏率均随播种量增加而呈先升后降的趋势,播种量为11.25 kg/hm~2种子产量最高,播种量为15.00 kg/hm~2时越夏率最高。杂草生物量则随白三叶草播种量的增加呈下降趋势。因此,白三叶草在丘陵红壤区幼龄果园适宜播种量为11.25~15.00 kg/hm~2。
In order to investigate the effects of different seeding rates on the growth, yield and over-summer rate of white clover (Trifolium repens L.) and on the control of weed biomass, different seeding rates of white clover in young orchard were studied from October 2012 to November 2013 the study. The results showed that as the sowing rate increased, the number of emergence of white clover and the height of grass layer showed an upward trend, but the stem diameter, the leaf SPAD value and the fresh weight per plant all showed a decreasing trend. The yield of fresh white clover increased significantly with the increase of sowing rate. When the sowing rate was less than 15.00 kg / hm ~ 2, the increase was significant and the difference was significant between the treatments. However, when sowing rate was 15.00 ~ 18.75 kg / hm ~ 2 The yield of white clover decreased with the sowing rate increasing. The seed yield of 11.25 kg / hm ~ 2 was the highest, the sowing rate was 15.00 kg / hm ~ 2 When the more the highest rate of summer. The weed biomass decreased with the increase of seeding rate of white clover. Therefore, the suitable seeding rate of white clover in young orchard in hilly red soil region was 11.25-15.00 kg / hm ~ 2.