Simulation on Distribution of Photosynthetically Active Radiation in Canopy and Optimum Leaf Rolling Index in Rice with Rolling Leaves

Hu, Ning; Chuangen, Lu; Yao, Ke-min; Jiang-shi, Zou

doi:10.1016/s1672-6308(08)60082-7

Cited by 10 publications

(5 citation statements)

References 3 publications

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“…In 3LH, however, only the leaf area had a significant effect on yield; the effect of leaf extension rate was weak, about 12.80% of the effect of LAI. Leaf uprightness facilitates a lower light extinction coefficient and allows the lower leaves to receive more radiation, and the net assimilation rate of 2LH with upright leaves is high and has a significant yield advantage over 3LH in areas with superior radiation and heat [26][27][28][29]. In this study, 2LH also had a lower light extinction coefficient than 3LH, which is consistent with previous findings.…”

Section: N Rates Affect the Light Extinction Coefficientsupporting

confidence: 90%

Is the Two-Line Hybrid Rice a Hindrance to the Efficient Use of Nitrogen Fertilizer in China?

et al. 2022

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Two-line hybrid rice (2LH) is accompanied by more nitrogen (N) input. To explore the difference in response of two-line and three-line hybrid rice (3LH) to N application, a three-year split-plot experiment was conducted. Three 2LHs and three 3LHs were set as main plots, and four N rates including 0 kg ha−1 (N0), 90 kg ha−1 (N90), 150 kg ha−1 (N150), and 210 kg ha−1 (N210) were set as subplots. 3LH had more panicles and yielded 7.95%, 6.31%, and 5.48% higher than 2LH in N0, N90, and N150, respectively. 2LH had a greater panicle weight in N210 and yielded 1.45% higher than 3LH. Leaf area index (LAI) had the greatest effect on the yields of both 2LH and 3LH, while the contribution of light extinction coefficient (K) was 46.35% and 12.80% those of LAI, respectively. The LAI, K, and radiation interception rate (RIR) of 2LH were smaller than those of 3LH in N0 and N90. The K of 2LH increased significantly as the N rate increased from 150 kg ha−1 to 210 kg ha−1, while that of 3LH showed no significant change, making the maximum RIR of 2LH greater than that of 3LH. 2LH, which intercepted more radiation through greater leaf extension to achieve higher yields, was able to use nitrogen fertilizer efficiently under a high N rate in China.

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Section: N Rates Affect the Light Extinction Coefficientsupporting

confidence: 90%

Is the Two-Line Hybrid Rice a Hindrance to the Efficient Use of Nitrogen Fertilizer in China?

et al. 2022

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“…It is well know that erect leaves are capable of reducing the extinction coefficient and increasing light intensity in the lower part of canopy. For instance, in China's "super" rice breeding project, an erect top three leaves is considered a critical morphological trait (Hu et al, 2009;Yuan, 2011). In our study, heavy panicle varieties gained larger LAI than medium ones and more radiation was intercepted by either the whole canopy or the upper part of the canopy.…”

Section: Discussionmentioning

confidence: 99%

High-yielding traits of heavy panicle varieties under triangle planting geometry: A new plant spatial configuration for hybrid rice in China

Yang

et al. 2014

Field Crops Research

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“…Particularly, the angle between the leaf vein of the petiole and the stem was defined as the leaf base angle (α), and the angle between leaf tip, petiole, and stem was measured as the leaf opening angle (β) (Figure 2). The leaf rolling index was calculated according to Hu et al [15].…”

Section: Sampling and Measurementsmentioning

confidence: 99%

Comparison of Growth and Yield Characteristics of Mid-Season Hybrid Rice under Different Yield Levels

et al. 2020

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Analysis of growth and yield characteristics of rice with different yield levels is very important for the breeding of high-yield rice cultivators. To investigate the yield components’ variation, morphological characteristics of the panicles, leaves, and stems of rice varieties under different yield levels, a two-year field experiment was conducted in Chongqing China. The 20 mid-season Indica hybrid rice varieties were classified into three groups based on yield, comprising high-yield group (HG), mid-yield group (MG), and low-yield group (LG). The main reason for the superior yield of HG is that the varieties of this group had a significantly higher number of effective panicles per unit area than the MG and LG. In plant type factors, the leaf type factors were the most important reason causing yield difference of HG, MG, and LG. The average leaf roll index, average leaf length to width ratio, average leaf base angle, average leaf droop angle, and average leaf pillow distance of the upper three leaves were significantly or significantly negatively correlated with the yield, while the average leaf width, average leaf area, and the average distance of leaf edge were significantly or significantly positively correlated with yield, and the leaf droop angle was the most important plant type factor affecting the yield. Based on these results, we further quantified the plant type factors of HG and constructed an ideal plant type model for high-yield hybrid mid-season rice. Theoretical and practical basis could be provided for breeding mid-season Indica hybrid rice with super-high yield in the future to ensure food security.

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Simulation on Distribution of Photosynthetically Active Radiation in Canopy and Optimum Leaf Rolling Index in Rice with Rolling Leaves

Cited by 10 publications

References 3 publications

Is the Two-Line Hybrid Rice a Hindrance to the Efficient Use of Nitrogen Fertilizer in China?

Is the Two-Line Hybrid Rice a Hindrance to the Efficient Use of Nitrogen Fertilizer in China?

High-yielding traits of heavy panicle varieties under triangle planting geometry: A new plant spatial configuration for hybrid rice in China

Comparison of Growth and Yield Characteristics of Mid-Season Hybrid Rice under Different Yield Levels

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