title: Soil Fertility Map for Food Legumes Production Areas in China.
abstract: Given the limited resources of fossil energy, and the environmental risks of excess fertilizer on crops, it is time to reappraise the potential role of food legume biological nitrogen fixation (BNF) as sources of nitrogen for cropping systems in China. 150 soil samples across 17 provinces and 2 municipalities of China were collected and analyzed. A distribution map of the soil fertilities and their patterns of distribution was constructed. The pH results indicated that soils were neutral to slightly alkaline overall. The soil organic matter (SOM) and the available nitrogen (AN) content were relatively low, while the available phosphorus (AP) and available potassium (AK) contents were from moderate to high. Production areas of food legumes (faba bean, pea, adzuki bean, mung bean and common bean) were clearly separated into 4 soil fertility type clusters. In addition, regions with SOM, AN, AP and AK deficiency, high acidity and high alkalinity were listed as target areas for further soil improvement. The potential was considered for biological nitrogen fixation to substitute for the application of mineral nitrogen fertiliser.
authors.affiliation: Liaoning Research Institute of Cash Crops, Liaoning Liaoyang, 111000, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Li
authors.affiliation: Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Yang
authors.affiliation: Australian Grains Genebank, Grains Innovation Park, Department of Economic Development, Horsham, Victoria 3401, Australia.
authors.forename: Robert
authors.initials: R
authors.lastname: Redden
authors.affiliation: Liaoning Research Institute of Cash Crops, Liaoning Liaoyang, 111000, China.
authors.forename: Weifeng
authors.initials: W
authors.lastname: He
authors.affiliation: Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
authors.forename: Xuxiao
authors.initials: X
authors.lastname: Zong