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磷肥施用方式对长白落叶松播种苗生长的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2011年05期
Page:
16-20
Column:
研究论文
publishdate:
2011-09-30

Article Info:/Info

Title:
Effects of phosphorus applying method on growth of Larix olgensis sowed seedling
Author(s):
SUN Yu1*
1.Key Laboratory for Silviculture and Conservation of the Ministry of Education, Beijing Forestry University, Beijing 100083,China; 2.Jilin City Jiangmifeng Nursery of Jilin Province, Jilin 132206,China
Keywords:
Larix olgensis sowed seedlings fertigation bandplaced phosphorus
Classification number :
S723
DOI:
10.3969/j.jssn.1000-2006.2011.05.004
Document Code:
A
Abstract:
Phosphorus(P) is hard to dissolve and be absorbed for plants.To improve the P efficiency and find the best P applying method, Larix olgensis sowed seedlings (1-0) were used to study the growth effect and Puptaking by seedlings affected by P amounts and fertigation ratios.The experiment conducted the splitspot design,with P amounts as main treatment and fertigation ratios as side treatment. The results showed that P concentration, P content,phosphorus using efficency was affected by phosphorus amounts significantly. The P concentration arrived the highest lever under the phosphorus amount 326 kg/hm2,but the phosphorus use efficency increased as the phosphorus deceased,and arrived the highest lever (43 %)under the phosphorus amount 163 kg/hm2. At the same phosphorus amounts,fertigation ratios also had remarkable effect on P concentration, P content and phosphorus using efficency. Maximum of these indicators exhibited under 333 % fertigation ratio, for example the total P content and phosphorus use efficiency were 0079 g and 43 % respectively. The results showed that the best fertigation ratio was 333%. So a combination of two thirds of the phosphorus as basal fertilizer when transplanted, and one third as topdressing in August is the best phosphorus applying method for L. olgensis sowed seedlings.

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Last Update: 2011-09-30