Institute of Tropical Agriculture, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
C R Biol. 2010 Jan;333(1):61-7. doi: 10.1016/j.crvi.2009.10.002. Epub 2010 Jan 25.
A field experiment was conducted to evaluate photosynthetic efficiency along with different growth parameters of aromatic rice genotypes. Forty genotypes including three non-aromatic checks exhibited enormous variations for leaf area index (LAI), crop growth rate (CGR), relative growth rate (RGR), net assimilation rate (NAR), grain yield, total dry matter, harvest index and photosynthetic efficiency or energy use efficiency (Emu) at panicle initiation and heading stages. Minimum LAI-value was 0.52 in Khazar at PI stage and maximum was 4.91 in Sakkor khora at heading stage. The CGR-value was in the range of 4.80-24.11 g m(-2) per day. The best yielder BR39 produced grain of 4.21 t ha(-1) and the worst yielder Khazar gave 1.42 t ha(-1). Total dry matter (TDM) yield varied from 4.04 to 12.26 t ha(-1) where genotypes proved their energy use efficiency a range between 0.58 to 1.65%. Emu showed a significant positive relation with TDM (r=0.80()), CGR (r=0.72()) and grain yield (r=0.66(**)). A negative correlation was established between TDM and harvest index and LAI and RGR. Path analysis result showed that NAR at heading stage exerted highest positive direct effect (0.70) on Emu.
进行了田间试验，以评估芳香稻基因型的光合效率以及不同的生长参数。40 个基因型，包括 3 个非芳香对照，在叶面积指数（LAI）、作物生长率（CGR）、相对生长率（RGR）、净同化率（NAR）、籽粒产量、总干物质、收获指数和光合效率或能量利用效率（Emu）在穗期和抽穗期表现出巨大差异。PI 期最小的 LAI 值为 0.52（Khazar），最大的 LAI 值为 4.91（Sakkor khora）。CGR 值范围为 4.80-24.11 g m(-2) 每天。产量最好的 BR39 产生了 4.21 吨/公顷的籽粒，而产量最差的 Khazar 仅产生了 1.42 吨/公顷。总干物质（TDM）产量从 4.04 到 12.26 吨/公顷不等，基因型表现出的能量利用效率在 0.58 到 1.65%之间。Emu 与 TDM（r=0.80（））、CGR（r=0.72（））和籽粒产量（r=0.66（**））呈显著正相关。TDM 与收获指数和 LAI 与 RGR 呈负相关。通径分析结果表明，抽穗期的 NAR 对 Emu 有最高的直接正向效应（0.70）。
