摘要
ＵｐｔａｋｅｏｆｐｈｏｓｐｈｏｒｕｓｂｙｒｙｅｇｒａｓａｎｄｅｆｅｃｔｏｆａｄｄｉｎｇｏｒｇａｎｉｃｍａｔｅｒｏｎｉｎｏｒｇａｎｉｃＰａｂｓｏｒｐｔｉｏｎｉｎｒｅｄｓｏｉｌＹｅＱｉｎｇＦｕ，ＺｈａｎｇＱｉｎＺｈｅｎｇ，ＸｉＨａｉＦｕａｎｄＷｕ...
P labelled KH 2PO 4 with or without unlabelled ryegrass and 32 P labelled ryegrass with unlabelled KH 2PO 4 were respectively applied to red soil, and ryegrass was grown in the fertilized soil and harvested one month after sowing and then the radioactivities and total P content in ryegrass were measured. Results show that addition of organic matter to red soil can significantly stimulate the uptake of P by ryegrass seedlings from inorganic P applied to red soil; absorption of P from inorganic source is much greater than that from organic source; at the same application level of P, larger proportion of P derived from labelled inorganic phosphate was distributed in shoots than that from the labelled ryegrass.
关键词
红色土壤
无机磷吸收
无机物质
麦草
P tracer method, Phosphorus absorption, Red soil, Ryegrass
