Effect of Different Fertilization Treatments and Water Regulated Deficit on Growth and Yield Stability of Winter Wheat

A pot experiment was conducted to study effects of different fertilization treatments on water regulated deficit effect of winter wheat.Plants were subjected to 3 different fertilization treatments: no fertilizer(F0),compound fertilizer(F1)and Organic fertilizer+compound fertilizer(F2);and 2 different water treatments: well-water treatment(W: 75%FC) and water regulated deficit treatment at returning green-jointing stage(D: 50%FC~55%FC).The results showed that leaf area,plant highs and chlorophyll content of water regulated deficit treatments were lower compared to those of well-water treatments at booting stage under the same fertilization treatment.At anthesis,there were no significant difference on chlorophyll content between water regulated deficit and well-water treatments;there were no significant differences on leaf area and plant height between water regulated deficit and well-water treatments under F2 condition;water regulated deficit treatments had lower leaf area and plant height under F0 and F1 conditions.At jointing stage,photosynthesis of water regulated deficit treatments was lower than well-water treatments under F0 condition;under F1 and F2 conditions,there were no significant difference on photosynthesis between water regulated deficit and well-water treatments.At heading stage,water regulated deficit treatments had higher photosynthesis compared to well-water treatments under F2 condition,which suggested that there were super-compensation effect on photosynthesis under F2 condition after rewatering;but photosynthesis of water regulated deficit treatments was similar to well-water treatments under F0 and F1 conditions.Under well-water condition after heading stage,grain yield of water deficit treatment was significantly lower compared to well-water treatments under F1 and F0 condition;but water deficit treatments had no effect on grain yield under F2 condition.Under soil drought condition after heading,water regulated deficit treatment had no effect on grain yield under F0 and F1 condition;but water regulated deficit treatment improved grain yield under F2 condition.Under the same fertilization,water regulated deficit treatment improved the yield stability of wheat.Among water deficit treatments,the yield stability of wheat was the highest for F2 treatment,followed by F1 treatment,the yield stability of wheat was the lowest for F0 treatment.