organic matter, 129 g kg −1 sum of amino acids, small molecular peptides and oligo peptides, 44 g kg −1
nitrogen (N), 35 g kg −1 P2O5, and 7gkg −1 K2O. Pig manure compost was made by Tianniang Limited, China by composting pig manure at a temperature range of 30–70 ◦ C for 25 d.