超级稻测土配方施肥磷钾肥用量调整试验

在藤县藤州镇开展超级稻Y两优1号田间磷钾肥用量调整试验,研究县域不同土壤类型超级稻最佳磷钾施肥量。结果表明,在每667m2施用N 10kg、P2O52.8kg、K2O 8.0kg条件下,再增施磷肥对增加每穗总粒数、实粒数和千粒重有作用,但无增产作用,而且造成减产;在每667m2施用N 10kg、P2O54.0kg、K2O 5.6kg条件下,再增施钾肥对增加株高、有效穗、谷秆比起作用外,对稻谷增产不明显,甚至减产。根据当地农业生产实际和施肥经验,建议每667m2施N 10kg、P2O53kg、K2O 6kg。

Experiment of P and K formula fertilization amount adjustment by soil test for super-rice

In Tengzhou town, Tengxian, an experiment of P and K fertilization amount adjustment by soil test for super-rice Y-Liangyou-No.1 was conducted to study the best fertilization amounts in different soil types within the County. The results show that in condition of N 10kg, P2O5 2.8kg and K2O 8.0kg/667m2 fertilization, more P fertilization will influence total grain/ear, full grain number and thousand-grain-weight, but no function on yield increase, moreover, the yield will be decreasing. In condition of N 10kg, P2O5 4.0kg and K2O 5.6kg/667m2 fertilization, more K fertilization will influence plant height, effect ear and stalk, bur no obvious function on yield increase,even leading to yleld-decrease. Based on the local farming conditions and fertilization experiences, it is suggested that fertilization amount will be N 10kg, P2O5 3.0kg and KzO 6.0kg/667m2.