Phosphorus accumulation in grains of japonica rice as affected by nitrogen fertilizer

被引：20

作者：

Bi, Junguo ^{[1
]}

Liu, Zhenghui ^{[1
]}

Lin, Zhaomiao ^{[1
]}

Alim, Md A. ^{[1
]}

Rehmani, Muhammad I. A. ^{[1
]}

Li, Ganghua ^{[1
]}

Wang, Qiangsheng ^{[1
]}

Wang, Shaohua ^{[1
]}

Ding, Yanfeng ^{[1
]}

机构：

[1] Nanjing Agr Univ, Coll Agron, Nanjing 210095, Jiangsu, Peoples R China

来源：

PLANT AND SOIL | 2013年 / 369卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Phosphorus accumulation; Nitrogen; Grain; Japonica rice; PHYTIC-ACID; POTASSIUM; CEREAL; SEEDS;

D O I：

10.1007/s11104-012-1561-4

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

This study aims to investigate the effect of nitrogen (N) on grain phosphorus (P) accumulation in japonica rice. Six cultivars with contrasting agronomic traits were grown for 3 years (from 2008 to 2010) of field experiments under seven N treatments and 1 year (in 2010) of pot experiments with five N treatments to study the effect of N on grain phosphorus accumulation and to explore its physiological foundation. Grain total P and phytic acid concentration showed a clearly decreasing trend as N rate increased for both field and pot experiments. Pot experiment revealed that application of N increase plant biomass, but tended to lower plant P uptake, especially for the split topdressing treatments. Both harvest index (HI) and P harvest index (PHI) increased with N rate, but PHI was consistently higher than HI, indicating the larger proportion of P translocation to grain than that of dry matter by N. Further, ratio of PHI/HI differed significantly among genotypes, but was stable across contrasting N treatments. The combination of decreased plant P uptake and dilution effect of increased grain yield by N is proposed as underlying mechanism of the decreased grain P concentration by high N.

引用

页码：231 / 240

页数：10

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