Effects of mechanochemically activated phosphate rock on maize growth and phosphorus use

It is well known that mechanochemically activated phosphate rock (MAPR) could improve extractable phosphorus (P) (extracted in 2% citric acid) greatly an ecological way. To evaluate the agronomic effectiveness of MAPR, we conducted a field experiment using spring maize Luvisol (pH 6.47) soil Northeast China for three consecutive years. Treatments consist variation P levels substitution triple superphosphate (TSP) (100% TSP, 10% 20% 50% 100% MAPR). Compared with all combined applications MAPR and TSP were as effective on straw yield. had similar effect grain yield uptake, while significantly lower. For partial nutrient productivity apparent recovery treatment equal effectivity, likewise. POlsen, was equally operative, performance only last year (i.e. 2016). concluded 10–20% can be effectively replaced by without affecting neutral pH.