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WANG Lan, HUANG Guo-qin*, SUN Dan-ping, WANG Shu-bin
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Abstract: In order to screen a continuous cropping pattern of water and drought replanting rotation, which is sustainable and suitable for rice fields in southern China, we carried out an experiment with five treatments from 2014-2016. The “winter fallowearly ricelate rice” model was control (A), and there were four types of paddy field irrigation and drought multiple cropping rotation modes, including potatomaize ‖ soybeanlate rice→vegetablespeanut ‖ corn late rice→milk vetchearly ricelate rice (B), vegetablespeanut ‖ corn-late rice→milk vetchearly rice-late rice→rapepeanutlate rice (C), milk vetchearly ricelate rice→oil rapepeanutlate rice→potatomaize ‖ soybeanlate rice (D), oil rapepeanutlate rice→potatomaize ‖ soybeanlate rice→vegetablespeanut ‖ cornlate rice (E). We analyzed crop yield with mainly for late rice yield and the changes of soil nutrients under different planting patterns. The results showed that paddyupland multiple cropping rotation systems had advantages in yield, with the yield of late rice being higher than that of winter fallow cropping pattern. Compared with control, the paddyupland multiple cropping rotation systems increased soil organic matter and available nutrient content, being more conducive to organic carbon fixation. Paddyupland multiple cropping rotation patterns are planting patterns of increasing yield and improving soil fertility, with better performance for treatments C and E.
Key words: GF-2, C50 decision tree, random forest, tree species classification, temporal stage selection, support vector machines
WANG Lan, HUANG Guo-qin, SUN Dan-ping, WANG Shu-bin. Crop yield and soil nutrients under paddy-upland multiple cropping rotation systems. #br# -[J]. cje.
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URL: https://www.cje.net.cn/EN/abstract/abstract23479.shtml
https://www.cje.net.cn/EN/Y2018/V37/I11/3284