Effects of continuous cropping on yields and photosynthetic characteristics of peanuts in sandy soil region of Liaoning | 杈藉椋鸿浣骞撮瀵硅辩规у浜ч褰卞

Chinese. 璁ㄤ杩浣骞撮瀵硅辩规с骞茬╄川绉疮浜ч褰卞澶х版′欢涓姝ｈ杩浣2锛3锛4 骞村板绉妞辩锛浜遍缁娴瀹辩规ф骞茬╄川绉疮娴浜с缁琛ㄦㄦ翠釜叉锛杩浣骞撮澧锛辩缁跨稿姘瀛瀵煎害CO2娴搴娓涓锛朵腑杩浣4 骞磋辩缁跨ㄦ姣姝ｈ辩浣11.19%锛㈢Н涓瓒裤杩浣4 骞磋辩妞炬句浣负135.73g 58.84g锛杩浣 3 骞翠骇浣涓172.29kg.hm-2杩浣骞撮澧锛辩ㄦ共╄川绉疮ㄤ叉舵瑙寰涓灏界稿锛朵腑ㄨ遍跺澶村樊寮杈惧版捐姘村钩杩浣褰卞辩ц藉虹╃绉疮锛变浜х╃绉疮瀵逛骇舰锋冲т姝よ浣褰卞浣ㄨ瀵艰翠骇

English. The research aimed to explore the effects of the continuous cropping soil on the photosynthesis characteristics, dry matter accumulation and yields of peanuts. Four experimental fields of one year, continuous cropping two years, three years and four years were planted peanuts, and the indexes of photosynthesis characteristics and dry matter accumulation were measured on the blossom, pot-setting and maturing stages. The results showed that the relative chlorophyll content, net photosynthetic rate,stomatal conductance and intercellular CO concentration decreased gradually with increasing the continuous cropping years in the 2 whole growth period, whereas the leaf area took on the varying trend which rose first and went down subsequently. The peanuts leaf chlorophyll with continuous cropping four years at maturity was 11.19% lower than that of one year's. The pods weight and nuts weight of continuous cropping four years were the lowest, 135.73g and 58.84g, respectively. The yields of continuous cropping there years was the lowest, 172.29kg. With increasing the continuous cropping years the peanut plant dry matter accumulation in different growth stages was different, and significant differences between treatments were observed at blossom stage. It is concluded that the photosynthetic performances of the peanut leaves and the accumulation of organisms are affected by continuous cropping due to the results above. The accumulation of photosynthetic products has the key role to the yields, so the peanut yields are led to decrease by continuous cropping.