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首页> 外文期刊>Acta Horticulturae >Influence of root zone restriction on the growth of four Papaya (Carica papaya L.) genotypes
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Influence of root zone restriction on the growth of four Papaya (Carica papaya L.) genotypes

机译：根区限制对四种木瓜基因型生长的影响

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The variation in production among genotypes may be influenced by plant morphological characteristics or by edaphic and climatic factors. In this study, four papaya genotypes, two from 'Solo' group (sunrise Solo and Improved Sunrise Solo line 72/12)and two from "Formosa" group (Tainung 02 and Know-You 01) grown in yellow podzol at two distinct effective deepness (ED) were analyzed. The ED was determined using a penetrograph in a soil with average humidity of 17.2%. The area with ED of 34.5 cm thatreceived a maximum force of 4.12 MP a for penetration was delimited as an area with restriction (WR) to root growth, while, the area with minimum ED of 60.0 cm that received a force lower than 2.30 MPa for penetration as an area with no restriction (NR).Total leaf number (TLN), average leaf area (ALA), length of leaf central vein (LLCV), total leaf area (TLA), trunk diameter (TD), tree height (TH) and specific leaf weight (SLW) were determined under field condition in four plants per genotype, in bothED, five months after transplant of seedlings. A mathematical model(Log LA=0,315+1,85 Log LCV, R2=0,898)was adhysted ti estimate the leaf area (LA) using the length of LCV for the four genotypes. The WR plants showed significantly lower values of TLN, ALA, LLCV, TLA, TD and TH compared to NR plants. The SLW was significantly low only in the Tainung 02 which growth was the most affected by the root zone restriction among the four genotypes.
机译：基因型间生产的差异可能受植物形态特征或水生和气候因素的影响。在这项研究中，四种木瓜基因型，两种来自“独奏”组（日出独奏和改良的日出独奏线72/12），两种来自“福摩萨”组（Tainung 02和Know-You 01），分别在两种不同的黄色豆荚中生长深度（ED）进行了分析。使用渗透计在平均湿度为17.2％的土壤中测定ED。 ED为34.5 cm的区域受到最大4.12 MP a的穿透力，被划定为对根部生长有限制（WR）的区域，而ED为60.0 cm的最小区域受到了小于2.30 MPa的力。穿透量为无限制的区域（NR）。总叶数（TLN），平均叶面积（ALA），叶中央静脉长度（LLCV），总叶面积（TLA），树干直径（TD），树高（在田间条件下，在两种条件下在田间条件下测定了两种基因型中两种植物在植株移植后五个月内的两种基因型中的TH）和比叶重（SLW）。运用数学模型（Log LA = 0,315 + 1,85 Log LCV，R2 = 0,898），利用四种基因型的LCV长度估算叶面积（LA）。与NR植物相比，WR植物显示出TLN，ALA，LLCV，TLA，TD和TH的值明显更低。仅在Tainung 02中，SLW显着较低，在这四个基因型中，生长受到根区限制的影响最大。

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