施用沼肥对油茶苗生长的影响

Effects of biogas fertilizer application on growth status of Camellia oleifera seedlings

为了探寻施用沼肥对油茶苗生长的影响规律,设沼肥、沼肥化肥、化肥、不施肥(用作对照)4个处理,就其对油茶苗生长和土壤肥力的影响进行了盆栽试验。结果表明:油茶苗期施用沼渣底肥与沼液追肥,能有效促进其生长,且能提高土壤养分的含量。沼肥组油茶苗苗高的平均增量为(38.23±3.48)cm,苗高增长明显,其地径和冠幅的增量分别提高了19.4%与18.28%,与对照组的差异不显著;叶面积为(1587.97±43.82)mm2,与对照的差异极显著;沼肥组油茶苗每株新梢数量为(12.57±1.89)条,其平均长度为(51.27±2.83)cm,基部直径为(1.95±0.06)mm;其新梢长度与对照组的差异显著,其基部直径与对照组的差异极显著。沼肥组油茶苗叶片中叶绿素含量为(2.005±0.042)mg.g-1。施用沼渣底肥与沼液追肥,土壤中有机质、全氮、速效氮及代换性钙、镁、有效铜、锌含量的提高最为明显。

In order to research effects of biogas fertilizer application on growth status of Camellia oleifera seedlings,effects of biogas fertilizer,chemical fertilizer,mixed fertilizer of biogas slurry and chemical fertilizer and the control on C.oleifera growth and soil fertility were experimented with pot.The results indicated that applicating biogas residue as base fertilizer and biogas slurry for topdressing could stimulate growing of C.oleifera seedlings and improve soil fertility.The height increment in biogas fertilizer treatment was（38.23±3.95） cm,and it was significant.The increments of ground diameter and crown were 19.4% and 18.37%,respectively,and it was not significantly higher than the control.The leaf area was（1587.97±37.56） mm2,highly significantly bigger than the control.Number,length and base diameter of new shoots per plant in biogas fertilizer treatment were（12.57±1.28）,（51.27±2.83） cm and（1.95±0.05） mm,respectively.The length of new shoot was significantly higher than the control and the base diameter was highly significantly higher than the control.The chlorophyll content in biogas fertilizer treatment was（2.005±0.042） mg·g-1.applicating biogas residue as base fertilizer and biogas slurry for topdressing could greatly increase the contents of organic matter,total N,available N,exchangeable Ca,Mg,effective Cu,and Zn.