Abstract
ABSTRACT: The combined application of chemical fertilizer and organic fertilizer is an effective way to improve soil fertility, crop yield and quality. In this study, a field experiment was conducted to evaluate the yield, quality and fertilizer use efficiency of cabbage (Brassica oleracea var. capitata L.) grown under different ratios of organic fertilizer replacing chemical fertilizer at a rate of 225 kg N ha-l in 2019 and 2020. The fertilizer treatments included N0 (non nitrogen fertilizer), CK (only compound fertilizer was applied, N:P:K=15.0 %:6.5 %:12.4 %), T1, T2 and T3 (organic fertilizer replaced 15 %, 30 % and 45 % chemical fertilizer, respectively), and T4 (total nutrient input was reduced by 10 % under T2). Results showed that T2 had the highest marketable yield and fertilizer use efficiency, as well as the best quality. The marketable yield, vitamin C content, soluble sugar content, REN (apparent uptake efficiency of fertilizer N) and AEN (agronomic N use efficiency) of T2 increased by 32.2 %, 14,9 %, 5.5 %, 97. % and 55.6 %, respectively, in contrast, the crude fibers decreased by 34.0 %, compared with CK in the two years. In addition, T4 guaranteed the yield and moderately improved the quality of cabbage, compared with CK. Therefore, we can alternatively apply fertilization according to the purpose of capturing the highest yield or properly declining fertilizer to sustain soil texture and productivity.
Highlights
Vegetables play an important role in many diets and toward human health and improve quality of life in developing countries (BONOMI et al, 2019; SOURI et al, 2018)
Note: N0: the treatment of non-nitrogen fertilizer; CK: the control of only apply compound fertilizer; T1, T2 and T3: the treatment of organic fertilizer replace 15%, 30% and 45% chemical fertilizer, respectively; T4: under the condition of reducing 10% of total nutrient input, organic fertilizer replace 30 % chemical fertilizer
The total P content, available P content and organic matter content of the treatments with organic fertilizer replaced with chemical fertilizer (T1-T4) increased by 16.8 %, 24.3 %, and 10.9 % and -2.2 %, 20.0 %, and 5.2 %, respectively, compared with those of CK in 2019 and 2020 (Table 2)
Summary
Vegetables play an important role in many diets and toward human health and improve quality of life in developing countries (BONOMI et al, 2019; SOURI et al, 2018). Capitata L.) is an important fresh vegetable crop and plays an important role in different diets and human health in many countries, owing to its high nutritive value, which is abundant in fibers, vitamins, polyphenols and flavonoids, especially as a main source of glucosinolates (FAN et al, 2017; MARTINA et al, 2010). Cabbage is a leafy vegetable that needs a large amount of fertilizer. In vegetable cultivation such as cabbage fields, high. An effective fertilizer management method to improve soil fertility and the yield and quality of cabbage is urgently needed
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