Effects of different NPK ratios on nutrients absorption,carbon and nitrogen metabolism, and grain yield of rapeseed
YANG Yong1, LIU Qiang1,*, SONG Haixing1, GUAN Chunyun2,*, RONG Xiangmin1, PENG Jianwei1
(1Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resource Use, Hunan Provincial Key Laboratory of Plant Nutrition in Common University, College of Resource and Environment, Hunan Agriculture University, Changsha 410128,China; 2 National Center of Oilseed Crops Improvement,Hunan Branch,Changsha 410128,China)
Abstract:  A field experiment was conducted to investigate the effects of different NPK ratios on nutrients absorption, carbon and nitrogen metabolism, and grain yield of Xiangzayou 763 rapeseed. The results showed that the total amounts of free amino acids as well as the contents and total soluble sugar increased with increasing N levels,but there was no consistent effect for P and K levels on them. NPK accumulation and grain yields of rapeseed were increased with increasing N and P levels, but the influence of K was not obvious. Fertilizer use efficiencies of N and K decreased with increasing N and P levels. However, P fertilizer use efficiency increased first and then decreased with increasing P levels. The highest grain yield (2 231 kg·hm-2) was obtained from the treatment E (N∶P2O5∶K2O=10∶05∶05), followed by the treatment K (N∶P2O5∶K2O=1∶043∶057, which was 2 065 kg·hm-2. Effects of yield component factors on grain yields of rapeseed decreased in the order: effective pod numbers per plant>seeds per pod >1000-seeds weight．
Key words: 
Effects of different NPK ratios on nutrients absorption,carbon and nitrogen metabolism, and grain yield of rapeseed

›› 2012, Vol. 24 ›› Issue (1): 0-104.

• 环境科学 •

Effects of different NPK ratios on nutrients absorption,carbon and nitrogen metabolism, and grain yield of rapeseed YANG Yong1, LIU Qiang1,, SONG Haixing1, GUAN Chunyun2,, RONG Xiangmin1, PENG Jianwei1 (1Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resource Use, Hunan Provincial Key Laboratory of Plant Nutrition in Common University, College of Resource and Environment, Hunan Agriculture University, Changsha 410128,China; 2 National Center of Oilseed Crops Improvement,Hunan Branch,Changsha 410128,China) Abstract: A field experiment was conducted to investigate the effects of different NPK ratios on nutrients absorption, carbon and nitrogen metabolism, and grain yield of Xiangzayou 763 rapeseed. The results showed that the total amounts of free amino acids as well as the contents and total soluble sugar increased with increasing N levels,but there was no consistent effect for P and K levels on them. NPK accumulation and grain yields of rapeseed were increased with increasing N and P levels, but the influence of K was not obvious. Fertilizer use efficiencies of N and K decreased with increasing N and P levels. However, P fertilizer use efficiency increased first and then decreased with increasing P levels. The highest grain yield (2 231 kg·hm-2) was obtained from the treatment E (N∶P2O5∶K2O=10∶05∶05), followed by the treatment K (N∶P2O5∶K2O=1∶043∶057, which was 2 065 kg·hm-2. Effects of yield component factors on grain yields of rapeseed decreased in the order: effective pod numbers per plant>seeds per pod >1000-seeds weight． Key words: Effects of different NPK ratios on nutrients absorption,carbon and nitrogen metabolism, and grain yield of rapeseed

YANG Yong;LIU Qiang;*;SONG Haixing;GUAN Chunyun;*;RONG Xiangmin;PENG Jianwei

1Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resource Use, Hunan Provincial Key Laboratory of Plant Nutrition in Common University, College of Resource and Environment, Hunan Agriculture University, Changsha 410128,China; 2 National Center of Oilseed Crops Improvement,Hunan Branch,Changsha 410128,China

Received:1900-01-01 Revised:1900-01-01 Online:2012-01-24 Published:2012-01-24

Abstract

Abstract: A field experiment was conducted to investigate the effects of different NPK ratios on nutrients absorption, carbon and nitrogen metabolism, and grain yield of Xiangzayou 763 rapeseed. The results showed that the total amounts of free amino acids as well as the contents and total soluble sugar increased with increasing N levels,but there was no consistent effect for P and K levels on them. NPK accumulation and grain yields of rapeseed were increased with increasing N and P levels, but the influence of K was not obvious. Fertilizer use efficiencies of N and K decreased with increasing N and P levels. However, P fertilizer use efficiency increased first and then decreased with increasing P levels. The highest grain yield (2 231 kg·hm-2) was obtained from the treatment E (N∶P2O5∶K2O=10∶05∶05), followed by the treatment K (N∶P2O5∶K2O=1∶043∶057, which was 2 065 kg·hm-2. Effects of yield component factors on grain yields of rapeseed decreased in the order: effective pod numbers per plant>seeds per pod >1000-seeds weight．

Key words: rapeseed, NPK ratios, soluble sugar, free amino acid, yield

YANG Yong;LIU Qiang;*;SONG Haixing;GUAN Chunyun;*;RONG Xiangmin;PENG Jianwei. Effects of different NPK ratios on nutrients absorption,carbon and nitrogen metabolism, and grain yield of rapeseed YANG Yong1, LIU Qiang1,*, SONG Haixing1, GUAN Chunyun2,*, RONG Xiangmin1, PENG Jianwei1 (1Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resource Use, Hunan Provincial Key Laboratory of Plant Nutrition in Common University, College of Resource and Environment, Hunan Agriculture University, Changsha 410128,China; 2 National Center of Oilseed Crops Improvement,Hunan Branch,Changsha 410128,China) Abstract: A field experiment was conducted to investigate the effects of different NPK ratios on nutrients absorption, carbon and nitrogen metabolism, and grain yield of Xiangzayou 763 rapeseed. The results showed that the total amounts of free amino acids as well as the contents and total soluble sugar increased with increasing N levels,but there was no consistent effect for P and K levels on them. NPK accumulation and grain yields of rapeseed were increased with increasing N and P levels, but the influence of K was not obvious. Fertilizer use efficiencies of N and K decreased with increasing N and P levels. However, P fertilizer use efficiency increased first and then decreased with increasing P levels. The highest grain yield (2 231 kg·hm-2) was obtained from the treatment E (N∶P2O5∶K2O=10∶05∶05), followed by the treatment K (N∶P2O5∶K2O=1∶043∶057, which was 2 065 kg·hm-2. Effects of yield component factors on grain yields of rapeseed decreased in the order: effective pod numbers per plant>seeds per pod >1000-seeds weight． Key words: Effects of different NPK ratios on nutrients absorption,carbon and nitrogen metabolism, and grain yield of rapeseed [J]. , 2012, 24(1): 0-104.

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