不同氮肥对酥梨品质及土壤养分的影响

The effects of different nitrogen on pear quality and soil nutrients

为了研究酥梨果园施肥过程中不同种类氮素肥料对酥梨品质及土壤养分的影响,以提高酥梨果品的品质。试验设计空白、硝酸铵钙、硝酸铵、硫酸铵、尿素五个不同的施肥处理。结果表明:(1)施用硝酸铵钙可以显著增加土壤铵态氮、硝态氮含量,在成熟期比硝酸铵高出15.42%,比硫酸铵高13.13%,在幼果期硝态氮含量比硫酸铵高25.61%;(2)施用硝酸铵钙可以增加梨树土壤有机质的含量,在成熟期比硫酸铵处理高10.48%,比硝酸铵处理高16.03%。(3)追施4种形态氮肥对梨果含糖量、含钙量和维生素C的含量均显著高于不施氮处理。果皮含钙量以硝酸铵钙效果最明显,分别比尿素、硫酸铵、硝酸铵三个施肥处理高出23.96%、24.45%、24.70%。;(4)硝酸铵钙对增加果实可溶固形物有显著效果,其中硝酸铵钙处理的比尿素高10.15%,比硝酸铵高10.43%,比硫酸铵高10.90%。

In order to to improve the quality of pear fruit. We studied the pear orchard fertilization process, the effects of different types of nitrogen fertilizer on pear quality and soil nutrients. Experiment design CK, calcium ammonium ni- trate, ammonium nitrate, ammonium sulfate, urea five different fertilizer treatments. The results showed.. 1. Calcium ammonium nitrate could significantly increase soil ammonium nitrate content, After using calcium ammonium nitrate, at mature period the content of ammonium nitrogen was 15.42% higher than the ammonium nitrate, was 13.13% higher than the ammonium sulfate. In young fruit stage the nitrate nitrogen content was 25.61% higher than ammonium nitrate. 2. Using Calcium ammonium nitrate could increase soil organic. At mature period the content of ammoni- um nitrogen was 10.48% higher than the ammonium sulfate, was 16.03% higher than the ammonium nitrate. 3. Topdressing of four kinds of fertilizer on the content of different growth stages in Pear. The Pear sugar content, calcium and vitamin C were significantly higher than those without nitrogen application. In the pericarp, the most obvious effect was Calcium ammonium nitrate, respectively higher than the ammonium sulfate, ammonium nitrate and urea 23.96% ,24.45% ,24.70%. 4. The results indicated that the soluble solid material. Calcium ammonium nitrate high 10.15%than urea, high 10.43% than ammonium nitrate and high 10. 90% than ammonium sulfate.