The growth of timber root
root is the most important physiological processes significantly (Turner et al, 1985 and Gollan et al, 1985 cited by Vesper, 2534), the root has a duty to secure the support stem. Absorb water and nutrients from the soil. It also plays a role in plant physiology. The root cause Growth And the death of roots Directly affects the growth of the plant parts, and is associated with the growth of the elite Russell (1977) found that the growth of roots and shoots are connected in a fixed environment. But when there is variability of the environment. It will result in variability in the distribution of dry matter in roots and stems. The environment has a great influence on the growth of plants, including the factors that influence the growth and spread of the genetic roots of the climate, the soil of vegetation. The reduction of the acidity - alkalinity of the soil, soil temperature. Soil fertility Water or soil moisture And the amount of nutrients Kamonrat (2549) studied the spread and growth of roots rubber tree line 10 seeds found within the traditional university with a strong root system and has spread. The growth was better than open-pollinated seeds from RRIM 600, among which those seeds. It is appropriate to use as the source. There may be resistance to fungi can also take advantage of genetic diversity seems to be again. One way to control an outbreak of root. To study the growth and strength of the root timber. Has developed to be appropriate. The way that does not destroy the roots of plants (non - destructive method) to assess the spread of the root timber at a depth of soil Nares (2551) has developed a method of using a pipe Acrylic buried in the soil depth of 1 meter area. Timber species RRIM600 root system and shoot with a digital camera attached to the aluminum rod inserted into the soil depth imaging all depths. The images have to be interpreted as root length. Then drawing sectional density roots. The evaluation found that well correlated with how to penetrate the soil directly. This classified as measured using the Mini Raizo Tron Schroth and Sinclair (2003) used a mini Raizo - Tron in assessing the growth of crops in the field and is a recognized. Because it can measure speed Done continuously Labor savings (Rytter and Hansson, 1996; Ponti et al., 2004; Mainiero and Kazda, 2006) mini Raizo Tron as a way to better study the roots by other means such as a drill ground (Heeraman and Juma, 1993. ; Dickmann et al., 1996; Ephrath et al., 1999) from the soil (Caldwell and Verginia, 1989) and the use of water by plants (Kirkham et al., 1998).
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