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Interactive effect of gibberellic acid and NPK fertilizer combinations on ramie yield and bast fibre quality

机译:赤霉素和NPK肥料组合对麻产量和韧皮纤维品质的交互作用

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摘要

Understanding the effects of different combinations of nitrogen (N), phosphorus (P) and potassium (K) fertilizers and the effects of GA3 (gibberellic acid) foliar spray on the fiber quality and yield of ramie are important for maximizing the economic value of these plants. Three pot experiments were conducted using low NPK (140:70:140 kg/ha), normal NPK (280:140:280 kg/ha), and low NPK + GA3 (10 mg/L) treatments. In each experiment, following fertilizers were applied: no fertilizer (control), N, P, K, NP, NK, PK, and NPK. Ramie was harvested three times from each plant; ramie grown without fertilizers had significantly lower biomass and yield than plants grown with fertilizers. At both normal and low fertilization rates, application of NPK resulted in greater growth and yield than application of N, P, K, NP, NK, or PK. Unfertilized plants produced the thinnest fibres (22-24 µm), with lowest elongation rate (3.0–3.1%) and breaking strength (22.7–23.3 cN). Fibre yield and fibre quality were improved by application of GA3 + fertilizers. Maximum fibre yield was obtained at low NPK + GA3 treatment, resulting in 65–81% more yield than low NPK alone. GA3 with low NPK treatment significantly improved fibre diameter, fibre elongation, and breaking strength compared to both NPK alone and control treatment.
机译:了解氮(N),磷(P)和钾(K)肥料的不同组合的影响以及GA3(赤霉素)叶面喷洒对麻纤维质量和产量的影响,对于最大程度地提高these麻的经济价值至关重要。植物。使用低NPK(140:70:140 kg / ha),正常NPK(280:140:280 kg / ha)和低NPK + GA3(10 mg / L)处理进行了三个盆栽实验。在每个实验中,施用以下肥料:不施肥(对照),N,P,K,NP,NK,PK和NPK。 each麻从每棵植物中收获了三次。没有肥料的grown麻比有肥料的植物的生物量和产量要低得多。在正常和低施肥率下,施用氮磷钾比施用氮,磷,钾,NP,NK或PK的生长和产量更高。未受精植物的纤维最细(22-24μm),伸长率最低(3.0-3.1%),断裂强度最低(22.7-23.3 cN)。施用GA3 ++肥料提高了纤维产量和纤维质量。在低NPK + GA3处理下可获得最大的纤维产量,比仅低NPK的产量高65-81%。与单独的NPK和对照处理相比,低NPK处理的GA3显着改善了纤维直径,纤维伸长率和断裂强度。

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