Effects of different fertilizer application combined with different DPC quantities on photosynthesis property and yield of cotton directly seeded after wheat
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Abstract
Effects of three levels of N, P, K fertilizer application combined with two DPC spraying quantity on photosynthesis property and yield of cotton directly seeded after wheat were studied under a field condition. The results show that applying urea(225kg/hm2),superphosphate(450kg/hm2),potassium chloride(150kg/hm2)and spraying DPC(90g/hm2)can improve the maximal PSⅡ light energy transformation efficiency (Fv/Fm),PSⅡ activity(Fv/Fo),photosynthesis rate (Pn) and stomatal conductance (Gs) of leaves of cotton, and increase the canopy photosynthesis rate (CAP),bolls per plant, high-quality bolls and bolls weight of cotton. Compared with other treatments, lint yield is increased by 17.4%~33.9%.
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