Team:GDSYZX/Proof Of Concept

PROOF OF CONCEPT

Evidence

In this program, we have mentioned that the degraded feather can be used as fertilizer for plants and animals, and many studies have proved the efficiency of amino acid utilization in plant. For example, a study done by Wang has shown that, the production of cowpea was increased by 10.7% by spraying amino acid, comparing to the cowpea that chemical fertilizer was sprayed on [1]. This indicated that amino acid can be better utilized by plant. Moreover, both the plant height and the stem diameter increment were more significant, after spraying amino acid, than those of plant that was sprayed chemical fertilizer (Fig 1).

Fig 1. Effects of spraying different fertilizers on cowpea biomass. (a) Effects of spraying different fertilizers on cowpea yields over two seasons. (b) Effects of spraying different fertilizers on plant height. (c) Effects of spraying different fertilizers on stem diameter. CF, treatment sprayed with chemical fertilizer; AA, treatment sprayed with amino acids liquid fertilizer; AA9, treatment sprayed with liquid biological fertilizer [1].

Furthermore, a experiment did by Liu also support our point. Plants were treated with PNCF (pot soil with natural comopost fertilizer), PNPK (pot soil with chemical fertilizer), and PFAPSF (pot soil with free amino acid and short pepetide fertilizer) [2]. The results showed that all growth indicater, including leaf SPAD, fresh biomass, and dry biomass, is higher in plant treated with PFAPSF than those of plant treated with PNPK. This indicated that amino acid and peptide fertilizer facilitated plant growth(Fig 2).

Fig 2. Leaf SPAD value, fresh biomass of eggplant (above- and belowground ), dry biomass of eggplant (above- and belowground ) under three fertilizer treatments [2].

Reference

[1] Dongsheng Wang, Xuhui Deng, Bei Wang, et al. Effects of foliar application of amino acid liquid fertilizers, with or without Bacillus amyloliquefaciens SQR9, on cowpea yield and leaf microbiota. Plos One, 2019, 14(9): e0222048.

[2] Hongjun Liu, Xi Zhong, Yan Huang, et al. production of free amino acid and short peptide fertilizer from rapeseed meal fermentation using bacillus flexus NJNPD41 for promoting plant growth. Pedosphere, 2018, 28(2): 261–268.