To determine the sufficiency and deficiency indices of soil available Zn by the Agro Services International （ASI） method （ASI-Zn） for Zn fertilizer recommendation in rice production in the alluvial soil of the coa...To determine the sufficiency and deficiency indices of soil available Zn by the Agro Services International （ASI） method （ASI-Zn） for Zn fertilizer recommendation in rice production in the alluvial soil of the coastal Yellow Sea, the relationship between relative rice yield and soil available ASI-Zn concentration was analyzed from a ten-field experiment with various soil test classes ranging from low to high fertility in 2005 and 2006, and nine Zn fertilizer application rates （0, 7.5 15, 22.5, 30, 37.5, 45, 52.5 and 60 kg Zn/ha） arranged at random with three replications in each field. There was a significant quadratic relationship between soil available ASI-Zn and rice yield, and a significant linear relationship between soil available ASI-Zn concentration and Zn fertilization rate. For rice variety Wuyujing 3, soil available ASI-Zn was deficient when the value was at lower than 1 mg Zn/L, low at 1 to 2 mg Zn/L, sufficient at 1 to 2 mg Zn/L, excessive at higher than 7.5 mg Zn/L. Thus, Zn fertilizer recommendation could be done according to the sufficiency and deficiency indices of soil ASI-Zn. For most of alluvial soils of the coastal Yellow Sea in the study, the available ASI-Zn was lower than 1 mg Zn/L, and then the optimum application rate of Zn fertilizer was about 20 kg Zn/ha.展开更多
In this paper, applying the method of , we give the complete description of self adjointness of singular Dirac operators, their deficiency indices are supposed to be (2.2) and (1.1), respectively.
Background Few studies have given suggestions on appropriate individual progesterone dosage in patients with progesterone deficiency. This study was designed to provide a reference for the clinical use of oral progest...Background Few studies have given suggestions on appropriate individual progesterone dosage in patients with progesterone deficiency. This study was designed to provide a reference for the clinical use of oral progesterone by exploring the relationship among Body Mass Index （BMI）, dosage of progesterone, and serum progesterone concentration. Many gynecology and obstetrics doctors are unfamiliar with progesterone treatment. Our study is intended to help determine the dosage of oral progesterone. Methods This was a block randomized, open-label, prospective clinical trial. Eighty women undergoing cessation of menses were recruited, given oral progesterone therapy for 10 consecutive days. They were randomly assigned to four groups （four different doses of progesterone, n=20）： group A 100 rag/d, group B 200 rag/d, group C 300 mg/d, and group D 400 mg/d. Results Seventy-four patients （92.5%, 74/80） completed the study. It was observed that administration of progesterone significantly increased serum progesterone concentration in the four groups （all P 〈0.001）. And there is a positive correlation between the increase and dosage （rp=0.613, P 〈0.001）. A further linear regression analysis found the major regression equation： when 18.5 kg/m^2 -≤BMI 〈24 kg/m^2, Y=8.4820×10^0.003x （R^2=0.425, P 〈0.001）; Y was the increase of serum progesterone concentration in nmol/L, and X was the dosage of oral progesterone in mg/d. Conclusions Serum progesterone levels went up linearly as the dosage increased. The higher the patient＇s BMI, the higher dosage would be needed to achieve the same serum progesterone for different patients can be roughly calculated progesterone concentration. The appropriate dosage of ora in light of the results of this study.展开更多
文摘To determine the sufficiency and deficiency indices of soil available Zn by the Agro Services International （ASI） method （ASI-Zn） for Zn fertilizer recommendation in rice production in the alluvial soil of the coastal Yellow Sea, the relationship between relative rice yield and soil available ASI-Zn concentration was analyzed from a ten-field experiment with various soil test classes ranging from low to high fertility in 2005 and 2006, and nine Zn fertilizer application rates （0, 7.5 15, 22.5, 30, 37.5, 45, 52.5 and 60 kg Zn/ha） arranged at random with three replications in each field. There was a significant quadratic relationship between soil available ASI-Zn and rice yield, and a significant linear relationship between soil available ASI-Zn concentration and Zn fertilization rate. For rice variety Wuyujing 3, soil available ASI-Zn was deficient when the value was at lower than 1 mg Zn/L, low at 1 to 2 mg Zn/L, sufficient at 1 to 2 mg Zn/L, excessive at higher than 7.5 mg Zn/L. Thus, Zn fertilizer recommendation could be done according to the sufficiency and deficiency indices of soil ASI-Zn. For most of alluvial soils of the coastal Yellow Sea in the study, the available ASI-Zn was lower than 1 mg Zn/L, and then the optimum application rate of Zn fertilizer was about 20 kg Zn/ha.
文摘In this paper, applying the method of , we give the complete description of self adjointness of singular Dirac operators, their deficiency indices are supposed to be (2.2) and (1.1), respectively.
文摘Background Few studies have given suggestions on appropriate individual progesterone dosage in patients with progesterone deficiency. This study was designed to provide a reference for the clinical use of oral progesterone by exploring the relationship among Body Mass Index （BMI）, dosage of progesterone, and serum progesterone concentration. Many gynecology and obstetrics doctors are unfamiliar with progesterone treatment. Our study is intended to help determine the dosage of oral progesterone. Methods This was a block randomized, open-label, prospective clinical trial. Eighty women undergoing cessation of menses were recruited, given oral progesterone therapy for 10 consecutive days. They were randomly assigned to four groups （four different doses of progesterone, n=20）： group A 100 rag/d, group B 200 rag/d, group C 300 mg/d, and group D 400 mg/d. Results Seventy-four patients （92.5%, 74/80） completed the study. It was observed that administration of progesterone significantly increased serum progesterone concentration in the four groups （all P 〈0.001）. And there is a positive correlation between the increase and dosage （rp=0.613, P 〈0.001）. A further linear regression analysis found the major regression equation： when 18.5 kg/m^2 -≤BMI 〈24 kg/m^2, Y=8.4820×10^0.003x （R^2=0.425, P 〈0.001）; Y was the increase of serum progesterone concentration in nmol/L, and X was the dosage of oral progesterone in mg/d. Conclusions Serum progesterone levels went up linearly as the dosage increased. The higher the patient＇s BMI, the higher dosage would be needed to achieve the same serum progesterone for different patients can be roughly calculated progesterone concentration. The appropriate dosage of ora in light of the results of this study.
