Nutrient Management Research for Paddy Rice in Guizhou

The objective of this study was to evaluate different nutrients on yield and quality of kidney bean, one of the main summer vegetables in Guizhou. There were eight fertilizer treatments consisting of no fertilizer (CK), an optimal treatment (OPT) and treatments individually omitting N, P, K, Mg, B, and Mo within the OPT. The results obtained from this experiment and some other related experiments will be used to develop the best nutrient management for kidney bean in the region.

Kidney beans responded to all nutrients except Mg in the field experiment. Yields were reduced by 3.64 t/ha (-14.3%), 5.5 t/ha (-21.7%), and 4.4 t/ha (-17.4%) with omission of N, P, and K, respectively. Omitting Mo and B reduced kidney bean yield by 4.01 t/ha (-15.7%) and 4.07 t/ha (-15.9%), respectively, while omission of Mg only reduced kidney bean yield by 0.7 t/ha (-2.8%). The no fertilization (CK) treatment produced the lowest kidney bean yield of 15.4 t/ha, accounting for 60% of the OPT yield, implying low soil fertility and importance of balanced nutrients amendment to boost kidney bean yield on the studied soils. Quality analysis of kidney beans showed that crude protein content was reduced by 7% and 9% with omission of K and N, respectively, and by 5% with omission of P, Mg, and B each. No influence on kidney bean’s protein content was observed with the omission of Mo. Guizhou-BFDP-11