Universal Journal of Agricultural Research Vol. 12(1), pp. 121 - 132
DOI: 10.13189/ujar.2024.120112
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Morphophysiological Responses and Assimilate Dynamics of Several Types of Rice under Different Nitrogen Supply Conditions

Faisal ¹, Iskandar Lubis ^2,*, Ahmad Junaedi ², Didy Sopandie ^2
1 Program of Agronomy and Horticulture, Graduate School, Bogor Agricultural Institute. Jl. Meranti, IPB Dramaga Campus, Indonesia
² Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural Institute. Jl. Meranti, IPB Dramaga Campus, Indonesia

ABSTRACT

This research was conducted with the aim of examining the morphophysiological responses and assimilate dynamics of various types of rice under different nitrogen supply conditions. The research was conducted in a greenhouse in 2022. The experimental design employed was a randomized block design with two treatment factors: variety and fertilizer dosage. The variety factor comprises four varieties, namely IPB 3S (a new type of rice), Inpari 33 (a new high-yielding variety), Mentik Wangi (local varieties), and Hipa 21 (hybrid). The dosage factor consists of two levels: 0 kg h^-1 of nitrogen and 90 kg h^-1 of nitrogen. The results indicate that the IPB 3S and Mentik Wangi varieties exhibit a higher net assimilation rate from the primordia phase to the heading phase. This results in the conversion of a portion of the carbohydrates produced through photosynthesis into non-structural carbohydrates (NSC). These NSCs serve as food reserves that are allocated to seed filling, thereby contributing to an increase in grain weight per panicle. The non-structural carbohydrate (NSC) content in Inpari 33 and Hipa 21 at the heading stage is significantly lower than the NSC content at harvest. This suggests a hindrance in the translocation of assimilates from the vegetative part to the seed.

KEYWORDS
Dry Weight, NSC, Photosynthesis, Source, Sink

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Faisal , Iskandar Lubis , Ahmad Junaedi , Didy Sopandie , "Morphophysiological Responses and Assimilate Dynamics of Several Types of Rice under Different Nitrogen Supply Conditions," Universal Journal of Agricultural Research, Vol. 12, No. 1, pp. 121 - 132, 2024. DOI: 10.13189/ujar.2024.120112.

(b). APA Format:
Faisal , Iskandar Lubis , Ahmad Junaedi , Didy Sopandie (2024). Morphophysiological Responses and Assimilate Dynamics of Several Types of Rice under Different Nitrogen Supply Conditions. Universal Journal of Agricultural Research, 12(1), 121 - 132. DOI: 10.13189/ujar.2024.120112.