Nutrient Content of Coffee Peel with Different Composting Treatments and Its Effects on Coffee Plant Growth

doi:10.3969/j.issn.1000-2561.2020.04.001

Abstract

Abstract:

Coffee peel can be used as a potential organic fertilizer source for agricultural production, but the application of the coffee peel not rotten can inhibit the growth of coffee seedlings. Coffee peel and shattered coffee peel rotten with nothing or cellulase and pectinase were carried out to investigate the effects of different treatments on the coffee peel nutrient content and plant growth, and to provide basis for coffee peel fertilizer utilization. The results of laboratory tests showed that there was no significant difference on the nutrient content of coffee peel among the treatments, whereas the organic matter in the shattered coffee peel treated with cellulase and pectinase decreased by 7.90% compared with the coffee peel treated with no enzymes. Greenhouse pot experiments showed that the application of well-rotten coffee peel could significantly promote the growth of coffee seedlings, increase the leaf photosynthetic rate, chlorophyll content and nitrogen balance index. The application of shattered coffee peel treated with cellulase and pectinase increased the biomass production of coffee plant, leaf photosynthetic rate, chlorophyll content and nitrogen balance index over 50% compared with the control. Conclusively, shattered coffee peel treated with cellulase and pectinase was suggested to be used to promote the growth of coffee plants.

Key words: coffee peel, cellulase, pectinase, compost, growth of coffee plant

CLC Number:

ZHAO Qingyun,PU Haojie,WANG Qiujing,DONG Yunping,LIN Xingjun,SUN Yan,LONG Yuzhou. Nutrient Content of Coffee Peel with Different Composting Treatments and Its Effects on Coffee Plant Growth[J]. Chinese Journal of Tropical Crops, 2020, 41(4): 633-639.

Figures/Tables 5

Tab. 1 Coffee peel nutrient content under different treatments

养分含量 Nutrient contents	粉碎果皮+酶 Shattered coffee peel rotted with enzymes	果皮 Coffee peel	粉碎果皮 Shattered coffee peel	果皮+酶 Coffee peel rotted with enzymes
有机质/%	85.23±3.37^b	92.54±4.82^a	90.66±3.98^a	86.47±4.91^ab
全氮/(mg·g^-1)	15.17±0.26^a	15.15±1.44^a	14.75±0.50^a	13.31±0.98^a
速效磷/(mg·g^-1)	4.18±0.30^b	4.77±0.37^a	4.80±0.30^a	4.07±0.15^b
速效钾/(mg·g^-1)	46.45±4.62^a	49.99±4.16^a	47.57±2.98^a	46.43±5.41^a
钙/(mg·g^-1)	10.32±0.73^a	11.92±1.37^a	10.66±0.66^a	9.45±0.81^a
镁/(mg·g^-1)	10.70±1.00^a	10.55±1.83^a	9.93±0.45^a	10.85±0.66^a
锰/(mg·g^-1)	0.90±0.14^a	0.87±0.07^a	0.98±0.01^a	1.07±0.29^a
铜/(mg·g^-1)	0.136±0.007^a	0.129±0.001^b	0.135±0.003^a	0.107±0.009^c
锌/(mg·g^-1)	0.230±0.008^a	0.190±0.004^b	0.250±0.016^a	0.220±0.027^a
铁/(mg·g^-1)	9.10±0.28^b	9.46±0.08^a	8.96±0.15^b	8.95±0.42^b

Fig. 1 Coffee plant biomass production under different treatments CK: Soil untreated; Shattered coffee peel rotted with enzymes: Application of 5% shattered coffee peel with cellulase and pectinase; Coffee peel: Application of 5% treated coffee peel; Shattered coffee peel: Application of 5% treated shattered coffee peel; Coffee peel rotted with enzymes: Application of 5% coffee peel treated with cellulase and pectinase. Different lowercase letters indicate significant difference between treatments (P<0.05).

Fig. 2 Root growth parameters of coffee plant under different treatments CK: Control (soil untreated); Shattered coffee peel rotted with enzymes: Application of 5% shattered coffee peel with cellulase and pectinase; Coffee peel: Application of 5% treated coffee peel; Shattered coffee peel: Application of 5% treated shattered coffee peel; Coffee peel rotted with enzymes: Application of 5% coffee peel treated with cellulase and pectinase. Different lowercase letters indicate significant difference between treatments (P<0.05).

Fig. 3 Photosynthetic characteristics of coffee plant under different treatments CK: Control (soil untreated); Shattered coffee peel rotted with enzymes: Application of 5% shattered coffee peel with cellulase and pectinase; Coffee peel: Application of 5% treated coffee peel; Shattered coffee peel: Application of 5% treated shattered coffee peel; Coffee peel rotted with enzymes: Application of 5% coffee peel treated with cellulase and pectinase. Different lowercase letters indicate significant difference between treatments (P<0.05).

Fig. 4 Chlorophyll content and nitrogen balance index of coffee plants under different treatments CK: Control (soil untreated); Shattered coffee peel rotted with enzymes: Application of 5% shattered coffee peel with cellulase and pectinase; Coffee peel: Application of 5% treated coffee peel; Shattered coffee peel: Application of 5% treated shattered coffee peel; Coffee peel rotted with enzymes: Application of 5% coffee peel treated with cellulase and pectinase. Different lowercase letters indicate significant difference between treatments (P<0.05).

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