›› 2019, Vol. 31 ›› Issue (11): 1871-1879.DOI: 10.3969/j.issn.1004-1524.2019.11.13

• Horticultural Science • Previous Articles     Next Articles

Effects of different characteristic organic fertilizers on premature senescence tree's growth,quality,yield and nutrition status of top grafting Satsuma mandarin

LI Yongjie1, YI Shilai2, GAO Hengjin1, ZHU Xiaoting3, QIN Yu4, JIN Guoqiang1,*   

  1. 1. Co-Innovation Center of Citrus Industrial Technology in Linhai, Linhai 317000,China;
    2. Citrus Research Institute, Southwest University/Chinese Academy of Agricultural Sciences, Chongqing 400712, China;
    3. Station of Popularizing Speciality Technology in Linhai, Linhai 317000, China;
    4. Aodimei Agricultural Technology (Chongqing) Co. Ltd., Chongqing 404500, China
  • Received:2019-01-17 Online:2019-11-25 Published:2019-12-04

Abstract: In order to alleviate the negative impact of Satsuma mandarin premature aging on citrus tree growth, yield and quality, different organic fertilizers were applied to investigate their effects on the restoration of weak tree growth. The results showed that organic fertilizer promoted the growth of spring and autumn shoots in varying degrees. The treatment of 5 kg Nangbowang compound microbial fertilizer(HF)behaved better compared with other groups,the average length of annual spring shoots and autumn shoots increased by 10.0% and 19.3% compared with the control,in 2017,and the number of autumn shoots was 1.87 times over the control. In 2018,the amount of spring shoots of each organic fertilizer treatment group was significantly higher than the control,as the number and the yield of fruits also reached significant difference. Compared with the fruit yield of CK, the HF and 10 kg microbial fertilizer (NF) treatments were 20.1% and 127.0% higher in 2017 and 2018,respectively. It is noteworthy that there was no significant change in citrus yield of the control group during the two years. The organic fertilizer could also enhanced the soluble solids (TSS) content,the TSS value and the solid acid ratio (TSS/TA) of 10 kg Shangcheng biological organic fertilizer (SC) treatment were also higher than other organic fertilizers. Moreover,application of organic fertilizer could also significantly promoted the total potassium(K)absorption of spring leaves,but the variation regularity of nitrogen (N),phosphorus (P) and K content were complicated in other tissues or a certain treatment. In general,the 10 kg Aodimei organic fertilizer(AF)treatment have higher effect on nutrient content. Compared with CK,organic fertilizer and microbial fertilizer could increase available N,P contents in soil. In the third year after high grafting,the absorption amount of N, P and K was 20.43, 1.79 and 14.18 g in fruits with the yield of 8.04 kg per plant per year, while in the shoots and fruit of the year,the values was 42.00, 3.02 and 20.70 g,respectively,which would be helpful to agricultural production.

Key words: Satsuma mandarin, premature senescence, organic fertilizer, quality tree vigor, nutrient uptake

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