Replacement of fertilizers with sludge and rubber latex lutoid for nursering poly-bag rubber | การทดแทนปุ๋ยด้วยกากตะกอนน้ำเสียและกากขี้แป้งเพื่อการเพาะชำต้นยางชำถุง
2009
Orawan Siriratpiriya(Chulalongkorn University, Bangkok (Thailand). Institute of Environmental Research) E-mail:[email protected] | Suthon Chuaygud(Suratthani Rajabhat University, Surat Thani (Thailand). Faculty of Science and Technology) | Sattapong Chobkatanyoo(Chulalongkorn University, Bangkok (Thailand). Graduate School. Inter-Disciplinary of Environmental Science)
Replacement of fertilizers with sludge and rubber latex lutoid for nursering poly-bag rubber (budded stump RRIM 600) was conducted at agricultural area Tambon Saikhueng, Phrasang district, Suratthani Province. The treatments were arranged in Randomized Complete Block Design (RCBD) with 5 replications. The treatments were control, organic fertilizer cum rock phosphate fertilizer and chemical fertilizer, sludge cum rubber latex lutoid, and sludge cum rubber latex lutoid and chemical fertilizer. The result showed that chemical fertilizer and organic fertilizer could be replaced by sludge cum rubber latex lutoid equally or better off significantly. Both amendments could increase organic matter content, sufficiently supplied major elements (N, P, K) and Mg for growth of poly-bag rubber (height, diameter, size of canopy and dry weight of root) and basal application of rock phosphate fertilizer (170 grams/tree) in the field was not needed. Moreover, investment cost for nursering poly-bag rubber by using sludge and rubber latex lutoid was 8 times lower than that of organic fertilizer and chemical fertilizer.
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