Grain Yield, Dry Weight and Phosphorus Accumulation and Translocation in Two Rice ( Oryza sativa L.) Varieties as Affected by Salt-Alkali and Phosphorus

Zhijie Tian, Jingpeng Li, Xinhua He, Xueying Jia, Fu Yang and Zhichun Wang
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Zhijie Tian: Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
Jingpeng Li: Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
Xinhua He: Centre of Excellence for Soil Biology, College of Resources and Environment, Southwest University, Beibei, Chongqing 400715, China
Xueying Jia: Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
Fu Yang: Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
Zhichun Wang: Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China

Sustainability, 2017, vol. 9, issue 8, 1-16

Abstract: Salt-alkali is the main threat to global crop production. The functioning of phosphorus (P) in alleviating damage to crops from saline-alkaline stress may be dependent on the variety of crop but there is little published research on the topic. This pot experiment was conducted to study if P has any effect on rice ( Oryza sativa L.) yield, dry matter and P accumulation and translocation in salt-alkaline soils. Plant dry weight and P content at heading and harvest stages of two contrasting saline-alkaline tolerant (Dongdao-4) and sensitive (Tongyu-315) rice varieties were examined under two saline-alkaline (light versus severe) soils and five P supplements (P0, P50, P100, P150 and P200 kg ha ?1 ). The results were: in light saline-alkaline soil, the optimal P levels were found for P150 for Dongdao-4 and for P100 for Tongyu-315 with the greatest grain dry weight and P content. Two rice varieties obtained relatively higher dry weight and P accumulation and translocation in P0. In severe saline-alkaline soil, however, dry weight and P accumulation and translocation, 1000-grain weight, seed-setting rate and grain yield significantly decreased, but effectively increased with P application for Dongdao-4. Tongyu-315 showed lower sensitivity to P nutrition. Thus, a more tolerant variety could have a stronger capacity to absorb and translocate P for grain filling, especially in severe salt-alkaline soils. This should be helpful for consideration in rice breeding and deciding a reasonable P application in saline-alkaline soil.

Keywords: saline-alkaline tolerance; phosphorus application; optimal phosphorus; 1000-grain weight; seed-setting rate (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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