Effects that plants growing in overcrowded conditions

Effects that botanys growing in oercrowded conditionsThis report is examining the effects that plants growing in overcrowded conditions go through and what affects overcrowding has on seedlings making comparisons to plants which have been grown in normal/ideal special conditions. It also includes literature research into the different methods which are used for the growth of plants in both commercial settings and private setting and which method suits this investigation s purposes best. It gives results in both observational and quantitative ways and explains/gives definitions for words that may not have been understood.IntroductionThis is an investigation to discover what happens to a plant population of germinating seeds that are grown in overcrowded conditions compared to the germination of seeds that are grown in an electron orbit where they are sufficient nutrients, infinite and light.Literature researchTermsGermination the beginning of growth for a seed , the beginnings of a new plant 1Loam district soil composed of sand, silt, and clay in relatively even concentration. Loam soils generally contain more nutrients and humus than sandy soils, have better percolation and drainage than silty soils, and are easier to till than clay soils. Loams are gritty, moist, and retain water easily. 2Horticulture the industry and science of plant cultivation including the process of preparing soil for the planting of seeds, tubers, or cuttings. 3Overcrowding when the number of organisms exceed the carrying capacity of an area (in this investigation it lead be the soil) 4Vermiculite any of a group micaceous hyd appraise silicate minerals related to the chlorites and used in heat-expanded form as insulation and as a planting medium. 5Hydroponics the cultivation of plants in a nutrient-rich solution, or else than in soil, and under controlled conditions of light, temperature, and humidity. Also called aquaculture. 6Ideal germination conditions for 3 plant species1. da ikon (Raphanus sativus) sandy loam soil that has been tilled is ideal for germination and growth, seeds sine qua non to be planted at the write depth for the seed to germinate properly, 1cm for small radishes and 4cm for large radishes. Will germinate between 3 and 7 eld and is realize for harvesting in about 4 weeks.2. Pea (Pisum sativum) soak the seed in water for about 4 hours before planting it, plant the seeds in rows. The seeds should be planted about 2cm deep between 6 -8 cm apart. Water them daily as they require lots and use thoroughgoing mulch.3. California poppy (Eschscholzia californica) sow in soil that is in full sun, these poppies like soil that is of a poor soil condition. Sow directly onto the soil and and so dig the seeds in and add water and germination will begin within a few solar days.Germination methods used by horticulturalistsMethod pro s Con sGrowth in cotton wool Can observe the germination process easily The roots stupefy entangle in the cotton w ool and it may become difficult to remove the seed from the cotton woolGrowth in vermiculite Adds nutrients to the plants environmentHolds water precise well so that plants don t experience a shortage Research shows no disadvantagesHydroponics No soil is neededNutrient levels in the water are control for each type of plantStable and large yields of plantsNo major pest problems Plants may become infected with Verticillium wilt disease callable to the high moisture levelsWater and nutrient costs may be expensiveEvidence and measurement of growth in plantsMeasuring the space between the internodes of along the stem of the plantMeasuring the size of the leaves, by measuring the aloofness of the leaves along its mid vein to the node where it connects to the stem count the number of leaves on the plantChecking the weight of the plant (will not be used in this investigation as it requires a large number of plants and will result in plants being removed from the soil so that they can b e weighted, this will most likely result in the death of the plant.). practical effects of overcrowdingRadish size of the root (part which is harvested) will be greatly reduced, size of the leaves will be small and few leaves will be present, in truth rangy stems.Pea reduced size and number of leaves, flowering rate will be reduced, pods will be greatly reduced in sizeCalifornia poppy lives very well in malnourished soil and in overcrowded conditionsHow may overcrowding be overcome by the plant?Will grow noble thin stems and try to grow higher than other plants, roots system will be very small. Stems as a result of being tall and thin are unable to support the weight of the leaves and the plant collapses. Horticulturalists solve the problem of overcrowding by providing the plants with sufficient resources that they require for grow. They also remove the plants from the greenhouses before them become too big. If overcrowding does occur they separate the plants and give them suffici ent space, they will also dispose of any weak plants that will not grow properly.Investigation speculation The overcrowded plants will develop weak stems and their growth rates will be hampered due to lack of nutrients.AimTo investigate the effects of overcrowding on germinating seeds and the effects of overcrowding on the growth of seedlings.VariablesIndependent variable the number of radish seeds planted in each seedling tray.Dependent variable the growth of the plants in terms of their stem length and size of their leaves.Fixed variables the size of the seedlings trays must be the same size, the amount of soil placed in the seedling trays is filled to the same point, the amount of water minded(p) to each seedling tray must be equal in this case 500ml every 2nd day.ApparatusTwo seedling traysPotting soilRadish seedsRuler/measuring enterWaterCameraMethodFill two equally sized seedling trays with sand to the same point.Moisten the soil and prepare it for planting the seeds.Using R adish seeds, plant 9 seeds in the 1st tray using the conditions indicated on the back of the seeds packaging then in the 2nd tray plant at least 45 seeds in close law of proximity to each other.Once seeds have been planted place the trays in a tropical houseOnce germination has taken place and the plants have begun growing out of the soil measure the length of the stem and the length of the mid-vein in the leaves every 4 days.Measure the growth of the plants over a period of 40 daysResultsObservationsSeeds were plant the 26th January 2011After 2 days the soil began to lift in the overcrowded trayOn the 3rd day the seedling were beginning to emerge from the soil in the overcrowded trayOn the 5th day the seedling in the ideal conditions tray began to emerge from the soilThe overcrowded seedlings grew at a very unbendable rate in comparison to the ideal conditions seedlingThe growth rate of the overcrowded population plants slowed down where as the ideal conditions population plant s grew at a steady rateOn the night of the 15th of February 2011 the majority of the ideal conditions plant population s and some the overcrowded plants population s where eaten, possibly by slugsSeedling trays were removed from the hot house so that they remain plants would survive and so the damaged ones could recoverDamaged plant s stems began to shrink as the secondary leaves were getting ready to grow, once the secondary leaves had begun to grow larger and the plants were receiving food from being able to photosynthesis again, the stems began growing taller againIn the overcrowded tray the smaller plants stopped growing and the larger plants began to go limp as their stems became too long and too thin to support the weight of the leavesSome of the overcrowded plants began to experience their leaves going yellow and the plants starting to die forward due to lack of resourcesSee appendix figure 4 for picture of leaves yellowingQuantitative resultsFor tables of results see append ixFigure 1Figure 2 intelligenceThe length of the leaves in the ideal conditions plant population on the 16th day was so low compared to the leaves length on the 12th day due to the leaves having been eaten two days earlier by suspected to be slugs.The greater growth rate experienced in the overcrowded plant population in the rootage few days was most likely caused by chemical released by the seeds to encourage growth and as they are in such close proximity and there are so many it may cause them to have an overload of the chemical resulting the extremely fast initial growth rate.ConclusionThe overcrowded plants grew at faster rate than that of the ideal conditions plants yet the overcrowded plants became weak very quickly and as a result weaker plants remained small or died and taller plants grew flimsy. The ideal plants grew to be stronger and healthier plants despite that they were partially eaten.