LEAF NUTRIENT CONTENT AND TOMATO FRUIT YIELD AS AFFECTED BY SINGLE SUPER PHOSPHATE RATES APPLIED BY DRIP IRRIGATION
作者： Paulo Cezar Rezende Fontes , Juvenal Lopes Loures , Everardo Chartuni Mantovani , Jaime Barros da Silva Filho , None
DOI: 10.1080/01904167.2013.851694
关键词: Randomized block design 、 Nitrogen 、 Phosphorus pentoxide 、 Greenhouse 、 Hydroponics 、 Agronomy 、 Chemistry 、 Fertigation 、 Potassium 、 Drip irrigation
摘要: A drip fertigation system should use low-cost phosphorus fertilizer available in small markets to smallholders such as especially Brazilian tomato growers. study was conducted an unheated greenhouse establish optimum rate of single superphosphate (SS) formulate aqueous solution that can be applied plants through a low-pressure irrigation system. Five rates SS [18% pentoxide (P2O5)] 0, 25, 50, 100, and 200 g·plant−1, were evaluated randomized block design with four replications. Each subdivided into 15 equal parts. part dissolved water (210 mL for each plant) the mixture left settle 24 hours. The supernatant by every week weeks. grown 9 dm3 plastic bags containing fertilized substrate greenhouse. leaf contents nitrogen (N), potassium (K), calcium (Ca), magnesium (Mg), sulfur (S), copper (Cu), zinc (Zn) not affected treatments. ...
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