Results 91 to 100 of about 1,654 (146)

VARIATION OF ORGANIC PHOSPHORUS IN SOIL UNDER LONG-TERM FERTILIZATION ON LOESS PLATEAU

, 2003
采用Bowman和Cole提出的有机P分组方法,对长期施肥条件下土壤有机P的组成变化以及有机P及其组分与有机质、速效P的关系进行研究。结果表明,活性、中等活性、中等稳定性、高等稳定性有机P分别占有机P总量的 80.2%、9.8%、9.0 %、和2.0 %。有机无机肥配施可明显增加土壤有机P及活性、中等活性有机P、中等稳定性有机P含量,减少高等稳定性有机P含量。施肥对有机P各组分剖面分布规律影响不大。活性、中等活性有机P与速效P、有机质、有机P总量呈显著正相关,中等稳定性、高等稳定性有机P与速效P ...
张振明, 彭令发, 来璐, 郝明德
core  

[Association Study of Parity With Adverse Pregnancy Outcomes]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Yao J, Guo X, Dong X.
europepmc   +1 more source

[Robotic gastrectomy: Research progress and practical challenges]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Li B, Liang H.
europepmc   +1 more source

[Analysis of current status and trends of disease burden of knee osteoarthritis in China, 1990-2023]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Liao J, Wu Q, Wu G, Guo B, Zhang J.
europepmc   +1 more source

Effects of long-term fertilization on wheat yield on Loess Plateau

, 2003
以 18年长期肥料定位试验为背景 ,研究了长期施肥条件下小麦的增产效应 .18年单施氮肥平均增产 4 18.1kg·hm-2 ,增产率达 2 8.4 % ,其中干旱年减产率为 13.9% ,常态年、丰水年增产率达 30 .3%、5 8.9% ;单施磷肥平均减产率为 9.3% ,干旱年增产率达 6 .5 % ,常态年、丰水年减产率为 15 .4 %、10 .0 % ;有机肥平均增产率达 82 .8% ;NP、PM、NM、NPM平均增产率分别达 12 7.8%、118.9%、14 4 .4 %
党廷辉, 来璐, 王改玲, 郝明德
core  

[Effectiveness analysis of tibial nerve transection with epineurial suture and division of common plantar digital nerve branches in treatment of congenital macrodactyly in children]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Li D, Tian G, Li J, Zhao M, Zhao L, Liu J, Li H.   +6 more
europepmc   +1 more source

[Progress on the application of system dynamics model in the field of health management]. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban
Wu Q, Zhou H, Zhao B, Shao J.
europepmc   +1 more source

[Practice and reflection on sentinel lymph node navigation surgery for early gastric cancer]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Bu Z, Feng M, Ji K.
europepmc   +1 more source

[Survey on sleep status and OSA-18 questionnaire among preschool children in Zhongshan City]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Xu C, Fu M, Pan Z, Luo J.
europepmc   +1 more source

[Innovative Practices of Precision Nutrition in Obesity Intervention: From Theory to Application]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Ning H, Feng R, Wu H, Sun C.
europepmc   +1 more source