Respons Tanaman Padi terhadap Pemupukan N pada Lahan Sawah Tadah Hujan

Antonius Kasno, Tia Rostaman

Abstract


Nitrogen is a macro nutrient that is primarily needed by rice crop. Without N fertilizer the rice yield will be equal to that of unfertilized ones. There are inconsistence yield responses of rice to the nitrogen fertilization on the rainfed lands. The aims of the study was to verify the responces of rice yields to the nitrogen fertilization on rain-fed lowland. The research were conducted at six locations, namely Boyolali, Pati, Cianjur, Grobogan, Pandeglang, dan East Lampung, during the dry season of 2015 and 2016. The experiment was aranged in a randomized complete block design of three replications. Treatments were four levels of N fertilizer dosages. The N fertilizer dosages were: 0; 90; 135 and 180 kg/ha. All plots were applied SP-36 and KCl, each was 125 and 100 kg/ha, respectively. Results showed that most of the soil of rain-fed lowland contained low level of N. Rice crop in the rain-fed lowlands highly responded to N fertilization. N fertilization significantly increased plant height, number of tillers, dry grain yield, and dry straw weight. The optimum dosage of urea fertilizer for the lowland rain-fed rice was 265 to 300 kg/ha. Fertilizer dosage as recommended based on the rice yield target in the area is still valid to obtain high grain yield.


Keywords


Fertilizer; nitrogen; lowland; rainfed; rice

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DOI: http://dx.doi.org/10.21082/jpptp.v1n3.2017.p201-210

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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.


P-ISSN: 2541-5166
E-ISSN: 2541-5174
Terakreditasi No.646/AU3/P2MI-LIPI/2015 oleh Lembaga Ilmu Pengetahuan Indonesia


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