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Chinese Agricultural Science Bulletin ›› 2024, Vol. 40 ›› Issue (10): 35-43.doi: 10.11924/j.issn.1000-6850.casb2023-0279

Special Issue: 园艺

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Effects of Combined Application of Bio-organic Fertilizer with Reduced Chemical Fertilizer on Growth, Yield and Quality of Brassica campestris ssp. chinensis var. rosularis

ZHAI Caijiao(), CHENG Yujing(), QIU Liang, WANG Xiaoqiu, GE Lijiao   

  1. Jiangsu Yanjiang Institute of Agricultural Sciences, Nantong, Jiangsu 226012
  • Received:2023-04-11 Revised:2023-10-11 Online:2024-04-05 Published:2024-04-01

Abstract:

To investigate the effects of combined application of bio-organic fertilizer with reduced chemical fertilizer on growth, yield and quality of Brassica campestris ssp. chinensis var. rosularis, two fertilizer types F1 (N-P2O5-K2O=15-15-15), F2 (N-P2O5-K2O=26-9-9) and 7 application amounts, N1 (pure compound fertilizer 525 kg/hm2), N2 (F reduced by 10%+ bio-organic fertilizer 400 kg/hm2), N3 (F reduced by 10%+ bio-organic fertilizer 600 kg/hm2), N4 (F reduced by 10%+ bio-organic fertilizer 750 kg/hm2), N5 (F reduced by 20%+ bio-organic fertilizer 400 kg/hm2), N6 (F reduced by 20%+ bio-organic fertilizer 600 kg/hm2), N7 (F reduced by 20%+ bio-organic fertilizer 750 kg/hm2) were set up in the experiment. And no fertilization (CK) was also set as the blank control. The agronomic characters, yield, mineral elements and quality characters of B. campestris ssp. chinensis var. rosularis were investigated and analyzed according to the two factors of fertilizer type and fertilizer method. The results were as follows. (1) The interaction between the type of fertilizer and the application amounts had extremely significant effects on most agronomic traits and plant weight (P<0.01). Under different fertilizer treatments, the petiole length, petiole width, leaf weight, petiole weight and weight per plant were all showed as F2>F1. The weight per plant was significantly different between the two treatments (P<0.05). The combination of bio-organic fertilizer with reduced chemical fertilizer F2 were more conducive to the growth and yield increase of B. campestris ssp. chinensis var. rosularis. Under F1 and F2 treatments, the weight per plant was significantly correlated with the degree of development, leaf weight and petiole weight, but there was no correlation between plant weight and petiole thickness. Compared with N1, chemical fertilizer reduced by 10% and 20% combined with rational bio-organic fertilizer didn’t affect the growth of B. campestris ssp. chinensis var. rosularis, and could promote their growth to a certain extent. The maximum increase of weight per plant was 15.24%. (2) Compared with N1, chemical fertilizer reduced by 10% and 20% combined with rational bio-organic fertilizer didn’t affect the content of mineral elements in the edible part of B. campestris ssp. chinensis var. rosularis, and had beneficial effect on the accumulation of mineral elements. However, when the fertilizer were reduced too much, the activation ability of bio-organic fertilizer on soil elements such as P, Mg, K, Ca and other elements would be reduced by different degrees. (3) The type of fertilizer had extremely significant effect on the nitrate nitrogen content of B. campestris ssp. chinensis var. rosularis, and the interaction between the type of fertilizer and the application amounts had extremely significant effect on the coarse fiber of B. campestris ssp. chinensis var. rosularis (P<0.01). The combination of rational bio-organic fertilizer with reduced chemical fertilizer could increase the content of soluble sugar, soluble protein and vitamin C, and reduce the nitrate nitrogen content. Under different fertilizer treatments, the contents of soluble sugar, vitamin C and soluble protein of B. campestris ssp. chinensis var. rosularis were all showed as F1>F2, while the content of coarse fiber, total nitrogen and nitrate nitrogen were all showed as F2>F1, and the contents of vitamin C and soluble protein were significantly different between the two treatments (P<0.01). The combination of bio-organic fertilizer with reduced chemical fertilizer F1 were more conducive to improve the quality of B. campestris ssp. chinensis var. rosularis. The combination of rational bio-organic fertilizer with reduced chemical fertilizer could not only promote the growth, increase the yield, but also improve the quality of B. campestris ssp. chinensis var. rosularis. Based on yield and quality factors, F1N6 and F2N6 could be used as suitable fertilization methods under the experimental conditions.

Key words: Brassica campestris ssp. chinensis var. rosularis, bio-organic fertilizer, application amount, yield, quality