Nutritive Characters and Fertilization Index of Nitrogen,Phosphor,Potassium for Major Vegetable Species in Fujian Ⅲ.The Optimal Amount and the Ratio of N,P and K for Application
-
摘要: 进行3414田间试验,建立蔬菜氮磷钾二次多项式肥效模型,研究三要素最佳用量和比例。结果表明,经济施肥量平均分别为,叶菜类蔬菜N(23163)kghm-2、P2O5(7730)kghm-2和K2O(19048)kghm-2,根茎类蔬菜N(18337)kghm-2、P2O5(13040)kghm-2和K2O(22643)kghm-2,瓜果类蔬菜N(22163)kghm-2、P2O5(10741)kghm-2和K2O(217121)kghm-2,葱类蔬菜N(26136)kghm-2、P2O5(8359)kghm-2和K2O(243192)kghm-2,不同作物由于产量水平和营养特性不同,氮磷钾经济施肥量有明显差异,需根据具体蔬菜作物确定最佳施用量;根茎类和瓜果类的三要素最佳比例中磷钾肥比例明显高于叶菜类;菜田土壤碱解氮、Olsen-P和速效钾的测定值与蔬菜氮磷钾推荐施肥量之间满足指数函数关系,从而实现了根据土测值预测推荐施肥量的微观指导功能。Abstract: With 3414 fertilizer experiment,the models of NPK fertilization for vegetables were established with quadratic polynomial in the optimal amount and the ratio of three elements.The results showed that the economic level of fertilizations were different in average for various kind of vegetables,such as: N(237113)kgm-2,P2O5(15069)kgm-2,K2O(289104)kgm-2 for leaf vegetables;N(237113)kgm-2,P2O5(15069)kgm-2,K2O(289104)kgm-2 for tuberous root;N(22163)kgm-2,P2O5(10741)kgm-2,K2O(217121)kgm-2 for melon and fruit;and N(26136)kgm-2,P2O5(83?59)kgm-2,K2O(243192)kgm-2 for onions,respectively.The differences in yield and nutritive characteristics of varieties resulted significant changes in amount of NPK fertilization.Among the optimal ratio,P2O5 and K2O was obviously higher in onions,melons and fruits than in leaf vegetables.The content of alkali-hydrolysable nitrogen,Olsen-P and available K in tested soil fitted in well with the NPK of recommended fertilization in exponential function relationship.It indicated that the established models are capable in prediction for the fertilization in virtual.
-
Key words:
- Vegetables /
- NPK /
- regional fertilization mode /
- soil testing /
- recommended fertilization
-
[1] 金耀青,张中原. 配方施肥方法及其应用[M]. 沈阳:辽宁科学技术出版社, 1993: 35-60. [2] 鲁如坤. 土壤农业化学分析方法[M]. 北京:中国农业科技出版社, 2000. [3] 金耀青. 配方施肥的方法及其功能---对我国配方施肥工作的述评[J]. 土壤通报, 1989, 20(1):46-48. [4] 姚宝全,徐志平,章明清,等. 福建主要粮油作物测土配方施肥指标体系研究, Ⅲ。 区域施肥模型及其推荐施肥[J]. 福建农业学报, 2009, 24(2):137-142. [5] 张建丽. 福建主要粮油作物测土配方施肥指标体系研究 Ⅳ。 土壤速效氮磷钾测定值与最佳施肥量的关系[J].
点击查看大图
计量
- 文章访问数: 2945
- HTML全文浏览量: 91
- PDF下载量: 954
- 被引次数: 0