摘要
研究表明,N、P施用量对甜菜的光合速率表现显著的二次回归关系。不论何种施磷处理,施氮在0～180kg/hm2范围内,光合速率均随施氮量增加而提高,不施氮磷与施氮180kg/hm2、磷450kg/hm2比较,光合速率提高了46.8%。在施氮0～240kg/hm2各水平中,光合速率均随施磷量增加而提高。在不施氮条件下,不施磷的光合速率比施磷450kg/hm2提高了18.9%。光合速率与块根产量呈显著正相关、与含糖率呈显著负相关、与产糖量正相关,但不显著。获得光合速率最高值时的氮磷施用量大于获得较高甜菜产质量时的氮磷肥施用量。
The quadratic regression correlation was significant of photosynthetic rate with N,P applied,photosynthetic rate increased46.8%with N0～180kg/ha which compared with no P treatment and N180kg/ha,P 2 O 5 450kg/ha,photosynthetic rate increased with P fertilizer used to incease when N0～240kg /ha,photosynthetic rate increased18.9%which compared with no P and P 2 O 5 450kg/ha,there is a significant positive correlation between photosynthetic rate and root yield,negative correlation to sugar content,positive correlation to sugar yield,but not significant,the highest photosynthetic rate with N,P more applied than the highest sugarbeet yield and quality needed.
出处
《中国糖料》
2001年第3期19-21,共3页
Sugar Crops of China
基金
黑龙江省青年基金资助项目(Q966B11)
