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中国油料作物学报 ›› 2014, Vol. 36 ›› Issue (4): 476-.doi: 10.7505/j.issn.1007-9084.2014.04.007

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Effects of nitrogen and phosphorus on physiological characteristics and yield components of oil flax

  

  1. 1. Agronomy College, Gansu Agricultural University, Lanzhou 730070, China; 2. Gansu Provincial Key Laboratory of Aridland Crop Science, Lanzhou 730070, China
  • Online:2014-08-28 Published:2014-11-03

Abstract:

 To understand the effects of nitrogen (N) and phosphorus (P) on physiological characteristics and yield of oil flax, the cultivar Longyaza 1 was studied in fields under no-fertilizer (CK), P-fertilizer, N-fertilizer and NP-fertilizer. Dynamical changes of chlorophyll content and soluble sugar in leaf and stem during development in irrigated field. Results showed that changes of chlorophyll a and total chlorophyll were identical, and their peaks appeared at budding stage in leaf and at anthesis stage in stem respectively. Soluble sugar in leaf increased initially then decreased, and in stem it showed down-up-down trend. The peaks of soluble sugar accumulation appeared in leaf at anthesis stage and in stem at budding stage in stem. The chlorophyll a, total chlorophyll, soluble sugar contents and their accumulation improved with increased nitrogen and phosphorus. Number of capsules per plant, number of seeds per capsule, 1 000-seed weight and yield in NP-fertilizer treatment increased by 48.44%, 16.13%, 18.87% and 49.07% compared to CK respectively.

Key words:  Oil flax, Chlorophyll, Soluble sugar, Yield components