Assimilate Partition of Potato (Solanum tuberosum L.) as Response to Combination of Paclobutrazol and Nitrogen

JURNAL ILMIAH SAINS Pub Date : 2024-04-09 DOI:10.35799/jis.v24i1.52823

S. Runtunuwu, Edy F. Lengkong, Stella Tulung, Deisire N.S. Darus, Riung Tumambo

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Abstract

Increasing the productivity of potato (Solanum tuberosum L.) can be done by increasing biological production (biomass) and the ability to convert (partition) assimilate/photosynthate into economic results (tubers). The aim of this research is to find a better combination of paclobutrazol (PBZ) application and nitrogen (N) fertilization for tuber partition assimilate of potato. The experiment was conducted in Randomized Block Design (RBD) with three replications. The treatment was consists of nine combinations of PBZ treatments and N fertilization as follows: 1) 3 kg PBZ/ha + 200 kg N/ha, 2) 3 kg PBZ/ha + 250 kg N/ha, 3) 3 kg PBZ/ha + 300 kg N/ha, 4) 3,5 kg PBZ/ ha + 200 kg N/ha, 5) 3,5 kg PBZ/ha + 250 kg N/ha, 6) 3,5 kg PBZ/ha + 300 kg N/ha, 7) 4 kg PBZ/ha + 200 kg N/ha, 8) 4 kg PBZ/ha + 250 kg N/ha, 9) 4 kg PBZ/ha + 300 kg N/ha. The research results showed that at the beginning of growth up to 42 DAP (day after plan), the assimilate (dry material) was directed towards stem and leaf (shoot) growth. Next, at 56 DAP to 84 DAP the assimilate is allocated for tuber growth. The combination of 4 kg PBZ/ha + 200 kg N/ha produces the largest tuber weight Keywords: Potato (Solanum tuberosum L); nitrogen; paclobutrazol; partition assimilate

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马铃薯（Solanum tuberosum L.）对五氯硝基苯唑和氮的同化分配反应

提高马铃薯（Solanum tuberosum L.）的生产力可以通过增加生物产量（生物量）和将同化物/光合成代谢物转化（分配）为经济成果（块茎）的能力来实现。本研究的目的是找到施用吡唑醚菌酯（PBZ）和氮肥的更好组合，以提高马铃薯块茎的分区同化能力。试验采用随机区组设计（RBD），三次重复。处理由以下九种 PBZ 处理和氮肥组合组成：1) 3 千克 PBZ/ha + 200 千克氮肥/公顷；2) 3 千克 PBZ/ha + 250 千克氮肥/公顷；3) 3 千克 PBZ/ha + 300 千克氮肥/公顷；4) 3,5 千克 PBZ/ha + 200 千克氮肥/公顷；5)3.5 公斤 PBZ/ha + 250 公斤 N/ha，6) 3.5 公斤 PBZ/ha + 300 公斤 N/ha，7) 4 公斤 PBZ/ha + 200 公斤 N/ha，8) 4 公斤 PBZ/ha + 250 公斤 N/ha，9) 4 公斤 PBZ/ha + 300 公斤 N/ha。研究结果表明，在生长初期至 42 DAP（计划后第二天），同化物（干物质）主要用于茎和叶（芽）的生长。接下来，在 56 DAP 到 84 DAP 期间，同化物被分配给块茎的生长。4千克PBZ/公顷+200千克氮/公顷的组合产生的块茎重量最大：马铃薯（Solanum tuberosum L）；氮；矮壮素；分配同化物

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