Mineral fertilization and grass productivity in a long-term field experiment
Mineral fertilization and grass productivity in a long-term field experiment
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DOI：
10.1080/03650340.2012.695864
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发表时间：
2012-01-01
影响因子：
2.4
通讯作者：
Ragalyi, Peter
中科院分区：
文献类型：
--
作者：
Kadar, Imre;Ragalyi, Peter
研究了不同的N、P和K供应水平及其组合对钙质黑钙土上已建立的全草的产量和元素含量的影响。(1)在四年期间，仅氮就产生了4.8 t ha(-1)，而钾则产生了0.5 t ha(-1)干草剩余。与施氮对照相比，施氮肥使干草质量增加了四到五倍。 200 kg ha(-1) yr(-1) 氮剂量是最佳的。 150 mg·kg(-1)的AL-P2O5和AL-K2O供应量满足了草地对磷、钾的需求。氮、磷、钾供应量的增加使干草产量增加到七倍。(2)在100 kg ha(-1) yr(-1)处理中，每1 kg N产生的风干干草剩余产量为33 kg。(3)第二次收割的干草产量较少，但元素浓度较高。在某些情况下，N、P、Cu含量增加30-50%，Mo含量增加200-500%。磷酸根/钼酸根和硝酸根/钼酸根阴离子拮抗作用对Mo的吸收有负面影响。(4)Cu/Mo比根据NxP相互作用和削减表现出很大的变化。长期施肥可以极大地改变饲料的元素组成，因此通过干草分析定期控制似乎是合理的。
The effects of different N, P and K supply levels and their combinations were examined on the yield and element content of an established all-grass on a calcareous chernozem soil.(1) During the four years, the N alone produced 4.8 t ha(-1), while the K gave 0.5 t ha(-1) hay surplus. The N-fertilization lifted the hay mass four to five times compared to the N-control. The 200 kg ha(-1) yr(-1) N-dose was optimal. The 150 mg kg(-1) AL-P2O5 and AL-K2O supply satisfied the P and K demand of the grass. The rising N, P and K supply together increased the hay yield to its sevenfold.(2) Air dry hay yield surplus produced per 1 kg N was 33 kg in the 100 kg ha(-1) yr(-1) treatment.(3) The second cuts yielded less hay with higher element concentrations. The N, P, Cu content increased by 30-50% and Mo content by 200-500% in some cases. The phosphate/molybdate and nitrate/molybdate anion antagonism had negative effect on Mo uptake.(4) The Cu/Mo ratio showed great variability according to the N x P interactions and cuts. A long-term fertilization can drastically modify the element composition of the fodder, so its regular control by hay analysis seems to be reasonable.