Enhancing the performance of transplanted coarse rice by seed priming
Enhancing the performance of transplanted coarse rice by seed priming
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DOI：
10.1007/s10333-008-0143-9
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发表时间：
2009-03-01
影响因子：
2.2
通讯作者：
Murtaza, G.
中科院分区：
文献类型：
--
作者：
Farooq, Muhammad;Basra, Shahzad M. A.;Murtaza, G.
水稻育秧移栽是世界上主要的水稻栽培方法。巴基斯坦传统的育苗方法繁琐，产生的幼苗较弱，由于死亡率高，最终产量降低。本研究评价了种子引发对提高育秧苗和移栽水稻的潜力。在调查期间采用的种子引发工具包括传统浸泡（发芽前）、水引发48 h、水硬化（KCl或CaCl 2）（Psi s-1.25 MPa）24 h（1个循环）、抗坏血酸引发（用10 ppm抗坏血酸）48 h或种子硬化24 h。引发提高了秧苗活力，促进了移栽水稻的生长，提高了产量和品质。渗透硬化（KCl），从而导致最佳的性能，其次是渗透硬化（CaCl 2），硬化和抗坏血酸底漆。渗透硬化（KCl）处理的籽粒产量为4.28 t ha（-1）（未处理对照为3.51 t ha（-1）），秸秆产量为10.27 t ha（-1）（未处理对照为9.34 t ha（-1）），收获指数为29.41%（未处理对照为27.31%）。产量的提高是由于可育分蘖数的增加。
Raising the rice seedlings in the nursery and its transplantation into the flooded fields is principal method of rice cultivation in the world. Traditional nursery raising method in Pakistan is tedious and produces week seedlings, which reduces the final yield due to high mortality. The potential of seed priming to improve the nursery seedlings and thus the transplanted rice was evaluated in the present study. Seed priming tools employed during the investigation included traditional soaking (pre-germination), hydropriming for 48 h, osmohardening (KCl or CaCl2) (Psi s-1.25 MPa) for 24 h (1 cycle), ascorbate priming (with 10 ppm ascorbate) for 48 h or seed hardening for 24 h. Priming improved nursery seedling vigor and resulted in improved growth, yield and quality of transplanted rice. Osmohardening (KCl) consequently resulted in the best performance, followed by osmohardening (CaCl2), hardening and ascorbate priming. Osmohardening (KCl) produced 4.28 t ha(-1) (vs. 3.51 t ha(-1) from untreated control) kernel yield, 10.27 t ha(-1) (vs. 9.34 t ha(-1) from untreated control) straw yield and 29.41% (vs. 27.31% from untreated control) harvest index. The improved yield was attributed to increase in number of fertile tillers.