设置对照(CK)、生物菌肥(F)、土壤调理剂(M)及二者配施(FM)4种措施,研究重茬和非重茬果园0～20、20～40、40～60 cm土层的土壤养分及碳氮磷化学计量特征.结果表明,在重茬和非重茬果园,CK、F、M、FM处理较改良前土壤各土层TC、OC、TN、NO3--N、TP、AP含量均有所提高,而土壤NH4+-N含量有所降低;F处理较CK显著提高重茬果园0～20 cm土壤TC、NO3--N含量与非重茬果园0～20 cm土壤TC、OC、TN、NO3--N含量以及0～60 cm 土壤TP、AP含量;重茬果园土壤C∶N、C∶P、N∶P分布范围分别为14.21～17.97、94.50～120.40、5.60～7.68,非重茬果园各土壤C∶N、C∶P、N∶P 分布范围分别为 13.69～17.78、65.49～107.06、4.39～7.02;重茬与非重茬果园CK、F处理较改良前显著降低0～20 cm土壤C∶N,其与TC、TN、TP显著负相关;在非重茬果园F、M、FM处理较CK因TP显著提升引起C∶P和N∶P显著降低.综合考虑土壤质量和改良效果,单施1500kg/hm2生物菌肥对重茬果园和非重茬果园土壤改良效果最佳,说明生物菌肥在重茬果园和新生果园土壤改良方面具有很多大的应用潜力,但是不建议土壤调理剂与生物菌肥同时配施.
Effects of Soil Amendments on Soil Carbon,Nitrogen and Phosphorus and Their Ecological Stoichiometry Ratios in Orchards
To analyze the soil nutrients and the stoichiometric characteristics of carbon,nitrogen and phosphorus in 0-20,20-40 and 40-60 cm layers in replanted and no replanted orchards,control(CK),biological fertilizer(F),soil conditioner(M)and combination application(FM)were set up in this study.The results showed that compared with the value before improvement,the contents of soil TC,OC,TN,NO3--N-N,TP and AP were increased,while the contents of soil NH4+-N was decreased under the CK,F,M and FM treatments in the replanted and no replanted orchards.Compared with CK,F treatment significantly increased the contents of soil TC and NO3--N in 0-20 cm in the replanted orchard,and significantly increased the contents of soil TC,OC,TN and NO3--N in 0-20 cm and soil TP and AP in 0-60 cm in no replanted orchard.The distribution ranged of C∶N,C∶P,N∶P were 14.21-17.97,94.50-120.40,5.60-7.68 in the replanted orchard and were 13.69-17.78,65.49-107.06,4.39-7.02 in no replanted orchard,respectively.Soil C∶N was significantly decreased in the 0-20 cm by CK and F treatments in the replanted and no replanted orchard.Compared with CK,soil C∶P and N∶P were significantly decreased in the F,M and FM treatments caused by higher TP in no replanted orchard.Taking soil quality and improvement effect into consideration,the application of 1500 kg/hm2 bio-fertilizer only had the best soil improvement effect on the soil nutrients in the replanted and no replanted orchards,indicating that bio-fertilizer had a lot of application potential in the soil improvement of replanted orchards and new orchards,but it was not recommended to apply soil conditioner and bio-fertilizer together.
NETL
NSTL
万方数据
