摘要
研究表明，西瓜苗期对氮、磷、钾的吸收很少。随着植株的生长逐渐增多，抽蔓到一棚瓜成熟期间对氮的吸收有明显的线性关系，回归方程为ｙ＝０．１４１９ｘ－５．３８７８，ｒ＝０．９９７１＊＊。座果后对磷的吸收逐渐增多；开花结果后对钾的吸收逐渐增多。西瓜植株对、氮、磷、钾的分配在结果前主要用于叶的发育和建成，其次是茎、根的生长；座果后。
During 1987-1989 field experiments showed that watermelon absorbed little N,P,K during the seedling stage but it gradually took more when the vining stage.A significant linear relation was found on the N absorption from vining to the first harvest,with the regression equation being:y=0.1419 x-5.3878,r=0.9971 ** .The plant gradually absorbed more P after setting and took even more K during flowering and fruiting stages.N P and K primarily contributed to the development and establishment of leaves and they also supported the growth of stems and roots before fruiting.After setting,N,P,K were gradually concentrated in the fruits.
出处
《华北农学报》
CSCD
北大核心
1996年第3期112-116,共5页
Acta Agriculturae Boreali-Sinica
关键词
西瓜
氮
磷
钾
养分吸收
养分分配
Watermelon
Nitrogen
Phosphorus
Potasium
Natrition absorption
Nutrtion distribution
