渭北塬区苹果园土壤养分状况的研究

Research on Soil Nutrient Conditions in Apple Orchards on Weibei Highland Yuan Area

测定了渭北塬区(白水、宝鸡)56个苹果园0～20、20～40cm土层中有机质和有关养分的含量。结果表明,土壤有机质和全氮含量0～20cm土层分别为12.17±1.87g/kg和0.74±0.09g/kg;20～4Ocm土层分别为11.39±1.65g/kg和0.69±0.10g/kg,都属较低水平;土壤有效氮、磷、钾的供应状况是钾>磷>氮。土壤普遍缺氮,约40％土壤缺磷,而钾素含量丰富;土壤有效锌含量较高,锰次之,有效铁、铜相对较缺。

In this research tests,organic matter and some related nutrient contents in 0-20 cm and 20-40 cm soil layers in 56 apple orchards were determined on Weibei Yuan area (including Beishui and Baoji county). The determined results showed that organic matter contents and total N were 12. 17 ±1. 87g/kg and 0. 74 ±0. 09g/kg in soil layer of 0~20 cm deep,and 11. 39±1. 65g/kg and 0.10g/kg in 20~40 cm soil layer respectively,The supplies of available N,P and K in soil are K>P>N. Generally,soils are in shortage of N supplies. K contents are rich in soil while 40% of soils are deficient in P,and all the soils are deficient in N. The available Zn contents in soil are high,and Mn contents in soils are next,Also,soils are relatively deficient in Fe and Cu contents.