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Dry Matter Partitioning and Harvest Index Differ in Rice Genotypes with Variable Rates of Phosphorus and Zinc Nutrition

机译:磷和锌营养变化量基因型水稻的干物质分配和收获指数差异

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摘要

Phosphorus(P) and zinc(Zn) deficiencies are the major problems that decrease crop productivity under rice-wheat cropping system. Field experiments were conducted to investigate impacts of P(0, 40, 80 and 120 kg/hm^2) and Zn levels(0, 5, 10 and 15 kg/hm^2) on dry matter(DM) accumulation and partitioning, and harvest index of three rice genotypes ‘fine(Bamati-385) vs. coarse(F-Malakand and Pukhraj)' at various growth stages(tillering, heading and physiological maturity). The experiments were conducted at farmers' field at Batkhela in Northwestern Pakistan for two years in summer 2011 and 2012. The two year pooled data reveled that there were no differences in percent of DM partitioning into leaves and culms with application of different P and Zn levels, and genotypes at tillering. The highest P level(120 kg/hm^2) partitioned more DM into panicles than leaves and culms at heading and physiological maturity stages. The highest Zn level(15 kg/hm^2) accumulated more DM and partitioned more DM into panicles than leaves and culms at heading and physiological maturity stages. The hybrid rice(Pukhraj) produced and partitioned more DM into panicles than F-Malakand and Bamati-385 at heading and physiological maturity stages. Higher DM accumulation and greater amounts of partitioning into panicles at heading and physiological maturity stages was noticed with increase in P and Zn levels, and the increase was significantly higher in the coarse rice genotypes than fine. We concluded that the growing hybrid rice with application of 120 kg/hm^2 P + 15 kg/hm^2 Zn not only increases total DM accumulation and partitioned greater amounts into the reproductive plant parts(panicles) but also results in higher harvest index.

著录项

  • 来源
    《水稻科学(英文版)》 |2016年第2期|78-87|共10页
  • 作者

    Amanullah; Inamullah;

  • 作者单位

    Department of Agronomy,Faculty of Crop Production Sciences,University of Agriculture,Peshawar 25130,Pakistan,;

    Department of Agriculture Extension,Malakand Batkhela 23050,Pakistan;

  • 收录信息 中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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  • 入库时间 2022-08-19 04:05:58
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