RRL S.I.P. draft

Niña Beatrice L. Lumanag

The use of different mediums in hydroponics

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The use of both coco peat and shredded paper will have a better effect on the growth of the brassica rappa pekinesis (Chinese cabbage)

Independent Variable:
Number of seeds

Dependent Variable:
Growth rate of the Chinese cabbage

I. Processes involved in the Production:
A. Photosynthesis
B. Water Cycle
II. Reasons:
A. To make plants grow twice as fast
B. More plants can be grown in smaller areas
C. It is less labour intensive
III. Benefits:
A. It saves space and water
B. Recycles waste and promotes alternative energy
C. It has tastier and healthier organic products


Hydroponics is the science of growing plants in a medium, other than soil, using mixtures of the essential plant nutrient elements dissolved in water. It is very useful because it doesn’t need fertilization, cultivation, crop rotation, virtually has no weeds, is cleaner, has larger yields, less labour, better control, ease of starting off new plants and it is a means of upgrading poor plants. Hydroponics are also suitable for flat-dwellers in urban centres. (Dudley Harris, Hydroponics: The Complete Guide to Gardening Without Soil,1992, New Holland Publishing, pg. 18,19 and 22). Cocopeat can be used for hydroponics because it is eco-friendly alternative for to mined peat moss. It also holds a lot of water and has pH of 5.7 to 6.5. (John Mason, Sustainable Agriculture,2003, Australia, Landlinks Press, pg. 192). The researchers will be using Chinese cabbage as the test subject for whether or not it has faster growth rate. Chinese cabbage is suitable for testing because nutrient solution can either decrease or increase its growth rate. (David Jin and Sally Jin ,Advances in Multimedia, Software Engineering and Computing Vol. 1,2011, China, Springer-Verlag Berlin Hiedelberg,pg.227).

The concept of growing plants without soil goes way back in time to our prehistoric past. For example, the mythical Hanging Gardens of Babylon, the much worshipped flooding of the Egyptian Nile and the Floating Gardens of Mexico are all examples of hydroponics. History, as it always seems to do, has turned full circle and the rebirth of hydroponics is back with us. Approximately 90% all cut fresh flowers purchased are hydroponically grown and an estimated of 65% of all fruit and vegetables purchased are, again, grown in hydroponics system. In hydroponics, water, nutrient and air are mainlined directly to the rootball, freeing the plant to use its available energy in its upper leaf, fruit or flower development. (Hydroponics:Indoor Horticulture, Jeffrey Winterbone, 2005, U.K., Pukka Press Ltd., pg.1) Coir is a 100% natural and flowering substrate—it often consists of finer waste particles from coir, which is excellent in seedling mixes. However, any material that is too fine is less acceptable for hydroponic crop production, due to poorer aeration and water holding properties that may be too high.

(Successful Hydroponics: 21st Century Technology for Commercial and Home Application, Prof. Gert Venter. D. Eng., Gerhardus Venter, 2010, U.S., p. 263) Coconut fiber is also called palm pear, coco peat, cocos, kokos, and more commonly known coir, which is short for coir fiber pitch. It also decomposes after use, so disposal is less of a problem than with other products such as rockwool. (Best of Growing Edge: Popular Hydroponics and Gardening for Small Commercial Growers, Tom Alexander, 2000, U.S., New Moon Publishing Inc., p.33) Chilling of nutrient solution affects a plant’s physiology so that crops of cool season can bre grown where they normally can’t. (Hydroponic Solutions: Volume 1: Hydroponic Growing Tips, Volume 1, Douglas Peckenpaugh, 2004, U.S., New Moon Publishing Inc., p.32)

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