文档介绍：金乡大蒜氮磷钾营养吸收特点与合理施肥研究
摘要：
以金乡大蒜为试材，通过氮磷钾配方试验研究覆膜大蒜的养分吸收特点及最佳施肥量与施用方法。结果表明，金乡大蒜生长过程中，吸氮最多，钾次之，磷最少，吸收比例为N∶P2O5∶K2O=1∶∶。氮、钾吸收高峰在鳞茎膨大期，磷吸收高峰在蒜薹伸长期。金乡大蒜施用氮磷钾均有增产效果，最佳施用量为N kg/hm2，P2O5 kg/hm2， K2O kg/hm2。氮、钾肥施用方法均以2/3底施+1/3追施效果最好。
关键词：金乡大蒜； 需肥特点；合理施肥
中图分类号：+.2文献标识号：A文章编号：1001-4942（2015）02-0072-03
AbstractThe “3414” design was used to study the nutrient absorption characteristics and the optimum fertilization amount and method for mulched Jinxiang garlic. The results showed that during the growth of Jinxiang garlic， the absorption of nitrogen was the most， and then potassium and phosphorus. The absorption ratio of nitrogen， phosphorus and potassium was 1∶∶. The absorption peaks of nitrogen and potassium were both in the bulbing period， and the phosphorus absorption peak was in the garlic sprout elongation period. The application of nitrogen， phosphorus and potassium all could increase the garlic yield， and the optimal fertilization amounts were kg/h
m2 of N， kg/hm2 of P2O5， and kg/hm2 of K2O. The best fertilization method of both nitrogen and potassium was 2/3 as base fertilizer and 1/3 for topdressing.
Key wordsJinxiang garlic； Fertilizer characteristics； Retional fertilization
金乡县是闻名遐迩的中国“大蒜之乡”，大蒜常年种植面积约4万公顷，全部地膜覆盖，蒜头产量75多万吨，蒜薹10多万吨，均居全国首位。近年来，随着国内外大蒜及蒜制品需求量的增加，金乡县及其周边地区大蒜种植面积不断扩大。但缺少大