论文部分内容阅读
对甘肃省陇东地区苹果园采用垄膜集雨措施,按距主干不同距离及不同土层深度测定土壤氮素含量。结果表明,苹果园土壤全氮含量从树体至行间方向逐渐降低,0～30 cm深土层土壤全氮含量最丰富;距主干50 cm处土壤铵态氮含量较高;土壤硝态氮集中分布在距主干50 cm处,其中30～60、100～150 cm深土层中土壤硝态氮含量高;垄膜集雨苹果园土壤中铵态氮累积量明显高于清耕(对照)苹果园,距主干50 cm处土壤中硝态氮累积量与清耕(对照)苹果园相当,距主干100～200 cm范围内土壤中硝态氮累积量明显低于清耕(对照)苹果园。建议甘肃省陇东地区连年采用垄膜集雨苹果园适当调整施肥时间和肥料种类。
In the Gansu Province, Gansu Province, apple orchards using ridge film rain collection measures, according to the distance from the trunk and different soil depth determination of soil nitrogen content. The results showed that the content of total nitrogen in apple orchard decreased gradually from tree to row, and the soil total nitrogen content was the highest in 0-30 cm soil layer. The content of ammonium nitrogen in the soil layer at 50 cm height was higher than that in the soil layer. Concentrations of nitrate nitrogen in the soils of 30- 60 and 100-150 cm depths were concentrated at 50 cm away from the trunk. The accumulation of ammonium nitrogen in the soil collected by the ridge-film orchard was significantly higher than that of the milled orchards The accumulation of nitrate nitrogen in the soil at the depth of 50 cm from the trunk was similar to that of the cleared apple orchard. The accumulation of nitrate nitrogen in the soil at the depth of 100 ~ 200 cm from the trunk was significantly lower than that of the clear-tilled (control) apple orchard. It is suggested that successive Gansu Province Gansu Province Gansu Province, using ridge film mulching apple orchard appropriate adjustments fertilization time and type of fertilizer.