Pedosphere 7(2): 171--176, 1997
ISSN 1002-0160/CN 32-1315/P
©1997 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Influences of root zone restriction and nitrogen nutrition on hybrid wheat growth |
| ZHANG Rong-Xian, SHEN Zhen-Guo and GUAN Hong-Ying |
| Department of Agronomy, Nanjing Agricultural University, Nanjing 210095 (China) |
| ABSTRACT |
| To study the physiological effects of small root zone, plants of a hybrid wheat variety (Triticum aestivum L. cv. Meiyou 4) were grown in small pots (1 litre) or large pots (8 litre) with low nitrogen (50 mg kg-1 soil) and high nitrogen (200 mg kg-1 soil). Restricting root zone decreased dry weight of plants at the stages of stem elongation and flowering, compared to those of control plants grown in the large pots (P<0.01). Spraying of 6-benzylaminopurine (50 μmol L-1) increased dry weight of plants and chlorophyll concentration in leaves. Restriction of root zone decreased the concentrations of total nitrogen, chlorophyll and soluble protein in the flag leaf and accelerated senescence of the leaves. Supply of high nitrogen delayed senescence of the flag leaf. The results suggested that the shortage of nutrients, especially nitrogen deficiency, was the primary reason for the decreased growth of plant in the treatment of root zone restriction. |
| Key Words: flag leaf, hybrid wheat, nitrogen, root zone restriction, senescence |
| Citation: Zhang, R. X., Shen, Z. G. and Guan, H. Y. 1997. Influences of root zone restriction and nitrogen nutrition on hybrid wheat growth. Pedosphere. 7(2): 171-176. |
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