%0 Journal Article
%T Effects of spatial coupling of watering and fertilization on winter wheat photosynthetic characteristics and grain yield<br>水肥空间组合对冬小麦光合特性及产量的影响
%A SHEN Yu-fang
%A LI Shi-qing
%A SHAO Ming-an
%A <br>沈玉芳
%A 李世清
%A 邵明安
%J 应用生态学报
%D 2007
%I 
%X A soil column experiment was conducted with a fertile Eum-Orthic Anthrosols to study the effects of spatial coupling of watering and nitrogen(N)-and phosphorus(P)fertilization on the photosynthetic characteristics and grain yield of winter wheat.The column consisted of three layers,each layer being 30 cm in thickness and with an underlying 2 cm layer of coarse sand to obstruct water-and nutrient exchange.The results showed that relative content of chlorophyll(SPAD),net photosynthetic rate(Pn),and grain yield were significantly lower in the treatment of 0-30 cm soil drought and 30-90 cm soil wetness(D)than in that of 0-90 cm soil wetness(W).In these two watering treatments,a combined application of N and P got the highest SPAD,Pn and grain yield,followed by applying P,and N.The SPAD,Pn and grain yield were significantly higher when the fertilizer N was applied in 0-90 cm layer than in 0-30,30-60 and 60-90 cm layers,respectively.No significant differences in SPAD,Pn and grain yield were observed when fertilizer P was applied in 0-90 cm layer and in 0-30 cm layer.In treatment W,the SPAD,Pn and grain yield were the highest when N and P were applied in 0-90 cm layer,had no significant differences with those when the N and P were applied in 0-30 cm layer,but were significantly higher than those when the fertilization was carried out in 30-60 and 60-90 cm layers.In treatment D,no significant difference in SPAD was observed when the N and P were applied in different layers,but Pn and grain yield were significant higher when the N and P were applied in 0-90 cm than in 30-60 cm layer,and in 30-60 cm than in 60-90 cm layer.It was concluded that whether in treatment W or in treatment D,a combined application of N and P should be carried out in 0-30 cm soil layer.
%K spatial coupling of watering and fertilization
%K photosynthetic characteristics
%K grain yield
%K winter wheat<br>水肥空间组合
%K 光合特性
%K 产量
%K 冬小麦
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=826F62B34A5515C2&yid=A732AF04DDA03BB3&vid=13553B2D12F347E8&iid=F3090AE9B60B7ED1&sid=62FBAC05398DC4ED&eid=DC38A21B78D7E6CF&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=1&reference_num=17