ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Studies on the fertilizer requirements for targeted vegetable production and cropping sequence.

Subbiah, K. and Sundararajan, S.

Vegetable Science Year: 1990 Vol: 17 Issue: 1 Pages: 77-81 Ref: 2 ref.

1990

บทคัดย่อ

In a field experiment aimed at determining the amounts of fertilizers needed to produce targeted yields of each crop, the N, P and K required to produce 1 t of tomatoes were found to be 3.6, 0.7 and 5.8 kg/ha, respectively, with a response ratio of 48.92. For the production of 1 t of aubergines, the N, P and K requirements were 7.6, 1.4 and 17.3 kg/ha, respectively, and the response ratio was 89.85, indicating that the amounts of N, P and K required by aubergines are more than twice those required by tomatoes to produce a similar quantity of fruits. In this experiment, N, P and K fertility gradients were created in the experimental soil by growing a maize crop and by applying organic (farmyard manure) and inorganic fertilizers before growing aubergines and tomatoes. Values for postharvest soil tests predicted from preharvest soil tests (for organic carbon, available N, available P and exchangeable K) indicated the possibility of making fertilizer recommendations for a cropping sequence.