Uptake of nitrogen, phosphorus, and potassium by Mat Rush and effects of nitrogen and potassium fertilizers on plant yield and quality in paddy field soil

Shen WeiQi; Zhang GuoPing; Ma LiMeng; Gui WenGuang; Szmidt, R.

Journal of Plant Nutrition 26(4): 757-768


ISSN/ISBN: 0190-4167
DOI: 10.1081/pln-120018563
Accession: 003997742

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Uptake of nitrogen (N), phosphorus (P), and potassium (K) by Mat Rush (Juncus effusus var. decipiens) cv. Gangshan 3 and the effects of N and K fertilizers on the yield and quality of paddy field-grown Mat Rush were studied. Plant tissue N and K concentrations gradually declined with plant growth. Plant tissue P concentration declined slightly during the early growth, then increased during the effective stem tillering stage. The highest P concentration was 0.36%. The highest accumulations of N, P and K in foliage were 293.9, 59.7 and 374.5 kg/ha, respectively. Compared to the control, N fertilizer significantly increased stems per hill, average stem length, long stem percentage and stem chlorophyll content which are all beneficial to stem quality improvement, leading to significantly higher yield. However, the treatment also resulted in significantly higher stem flowering rate (SFR) which could reduce the stem quality of the crop. Significant difference in stem yield and quality due to application of 450 and 900 kg N2/ha were not significant. Potassium fertilizer significantly improved all quality parameters and yield, except for SFR. N at 450 kg/ha and equal amounts of K fertilizer applied to paddy fields are optimum to obtain high yield and quality in Mat Rush production.