Objective: To study the calcium absorption and utilization of nanometer pearl powder in rats.

Double stable isotope technique, a safety and accurate method todetermine calcium absorption in humans, has been recently applied to evaluatecalcium bioavailability.

By the design method of random block, effects of the combination of P, K and Ca on Calcium absorption of tomato in Greenhouse was studied.

Studies on kinetic parameters of inorganic phosphorus uptake in different sugar beet genotypes;

Facilitation of wheat to phosphorus uptake by soybean in the wheat soybean intercropping;

The effects of lanthanum on rice growth, phosphorus uptake and phosphorus chemical fractions in rice were studied with split-root nutrient solution culture method.