[Effects of calcium fertilizer application on peanut growth, physiological characteristics, yield and quality under drought stress].

An experiment was carried out to study the effects of different rates of calcium application on peanut growth, physiological characteristics, yield and quality under drought stress at pegging stage and pod setting stage in pool cultivation with rainproof, using variety 606 as experimental material. The results showed that applying Ca fertilizer under drought stress could promote peanut growth, increase the chlorophyll content, leaf photosynthetic rate and the root vitality, increase the recovery ability of peanut during rewatering after drought stress, alleviate the impact of drought stress on peanut. Applying Ca fertilizer under drought stress increased pod and kernel yields because of the increase of kernel rate and pod number per plant.

[Effects of paclobutrazol on the yield, quality, and related enzyme activities of different quality type peanut cultivars].

Selecting high-protein peanut cultivar KB008, high-fat cultivar Hual7, and high O/L cultivar Nongda818 as test materials, a field experiment was conducted in 2011 and 2012 to study the effects of foliar spraying paclobutrazol (PBZ) at late flowering stage on the kernel yield and quality and the activities of leaf carbon and nitrogen metabolism enzymes of the cultivars. Spraying PBZ increased the pod yield of the cultivars significantly via increasing the pod number per plant, decreasing the pod number per kilogram, and increasing the percentage of double kernel. Spraying PBZ also increased the kernel fat and soluble sugar contents but decreased the kernel protein content to varying degrees, and increased the O/L ratio of high-fat cultivar Hual7 significantly.