摘要
1997~ 1999年在不同 p H值黄泥土上施用磷石膏的试验结果表明 :施用磷石膏 5 0、10 0、15 0 kg/ 6 6 7m2 ,玉米产量与对照相比 ,p H 4 .30增产 7.8%~ 2 2 .9% ,p H 5.0 1增产 8.5%~ 17.1% ,p H 5.6 5增产 7.5%~11.5% ,p H6 .0 7增产 5.9%~ 8.3% ;投产比在 1∶ 2 .7以上 ;随磷石膏用量的增加土壤 p H值提高 ,土壤水解酸含量降低 ;磷石膏适宜用量为 50~ 10 0 kg/ 6 6 7m2。
The field experiments applying phospho gypsum in different acid yellow upland soil were carried out from 1997 to 1999. The results showed that the maize yields of applying phospho gypsum 50kg, 100kg, 150kg per 667m 2 increased by 7.8%~22.9% in pH 4.30 soil, 8.54%~17.1% in pH 5.01 soil, 7.5%~11.5% in pH 5.65 soil and 5.9%~8.3% in pH 6.07 soil compared with CK, respectively. With increase of application phospho gypsum, soil pH raises while soil hydrolytic acidity decreases. Its proper application amount is 750~1500kg/ha.
出处
《贵州农业科学》
CAS
2001年第2期43-46,共4页
Guizhou Agricultural Sciences
基金
国家"九五"科技攻关! ( 96 - 0 0 4- 0 3- 11)研究内容之一