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首页> 外文期刊>Plant Breeding and Seed Science >Growth analysis using curve fitting method in early and late sown sunflower
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Growth analysis using curve fitting method in early and late sown sunflower

机译：曲线拟合法在早播和晚播向日葵中的生长分析

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摘要

Effect of sowing time on productivity of sunflower was studied. Sunflower seeds were first sown in August (early) and the second sowing was done in September (late). Growth analysis was done at an interval of 5-6 days from germination to maturation.Growth was measured in terms of dry weight and leaf area. Various growth indices like RGR. RLGR, NAR, LAR, LWR, SIA, etc. were calculated. Cubic polynomial was the best fit for all the growth parameters. The dry matter accumulation, leaf area, leaf dryweight and leaf number were significantly more in late grown crop than early grown one. The rate of total dry weight, leaf area and leaf dry weight were higher in late grown crop as compared to early grown one. RGR, RLGR and NAR were higher in the late grown crop from the beginning. which gradually decreased later on, in both the crops. LAR was distinctly more in late grown crop between d 30-40. Changes in SLA were similar to LAR while LWR was more in the beginning and decreased afterwards. RGR showed more correlation with NAR and very low correlation with LAR in both the crops. Thus it is concluded that the late sown crop had better growth, but still, to obtain maximum productivity in sunflower, improvement in RGR and NAR is required.
机译：研究了播种时间对向日葵产量的影响。向日葵种子首先在8月（早期）播种，第二次播种在9月（后期）进行。从发芽到成熟的间隔为5-6天进行生长分析，以干重和叶面积衡量生长。各种增长指数，例如RGR。计算了RLGR，NAR，LAR，LWR，SIA等。三次多项式最适合所有增长参数。早熟作物的干物质积累，叶面积，叶片干重和叶数明显高于早熟作物。与早熟作物相比，晚熟作物的总干重，叶面积和叶干重的比率更高。从一开始，晚熟作物的RGR，RLGR和NAR较高。后来在两种作物中逐渐减少。 LAR在30-40天之间的晚熟作物中明显更多。 SLA的变化与LAR相似，而LWR在开始时更多，而在之后减少。在两种作物中，RGR与NAR的相关性较高，与LAR的相关性较低。因此可以得出结论，晚播作物生长较好，但仍要获得向日葵的最大产量，仍需要提高RGR和NAR。

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