[Effect of NH4(+) -N/NO3(-)-N ratio in applied supplementary fertilizer on nitrogen metabolism and main chemical composition of Pinellia ternata].

Objective: To study the effect of nitrogen forms on nitrogen metabolism and main chemical composition of Pinellia ternate.

Method: Through the soilless cultivation experiment and based at the same nitrogen level and different NH4(+) -N/NO3(-) -N ratios, nitrate reductase (NR) activity, glutamine synthetase (GS) activity, the content of nitrate nitrogen and ammonium nitrogen in different parts of P. ternate were determined.

[Effect of exogenous Ca2+ on protective infection of Pinellia ternata and accumulation of major components under high temperature stress].

Objective: To study the effect of exogenous Ca2+ on protective infection of Pinellia ternata and accumulation of major components under high temperature stress.

Method: The soilless cultivation experiment was applied, stress resistance index of P. ternata leaves, statistics the rate of lodge P.