摘要
在全省不同地点不同肥力水平的菜田,设置以小白菜和菜心为代表的叶菜田间施肥试验,对施磷量、土壤有效磷含量、叶菜相对产量和相对吸磷量等一系列试验数据进行相关统计分析,并求取相应的回归方程,建立合适的数学模型,以此初步建立广东叶菜基于土壤Olsen-P含量的土壤有效磷养分丰缺指标和不同磷素肥力土壤的推荐施磷指标。建立叶菜土壤有效磷丰缺指标的数学模型为y(相对产量)=12.36ln(x)+38.495,相关系数R为0.685;y(相对吸磷量)=18.513ln(x)+11.517,相关系数R为0.685。建立叶菜推荐施磷量的数学模型菜心为y=-1.274ln(x)+8.3839,相关系数R为0.649。小白菜为y=-0.3871ln(x)+3.2416,相关系数R为0.637。根据所选数学模型求取相对产量为50%、50%～75%、75%～95%和>95%的叶菜土壤有效磷丰缺范围分别为<5 mg/kg、5～25 mg/kg、25～95 mg/kg和>95 mg/kg。当土壤Olsen-P含量<5 mg/kg时,推荐每667 m2总施磷量菜心为6.3 kg、小白菜为2.6 kg;土壤Olsen-P含量在5～25 mg/kg时,推荐每667 m2总施磷量菜心为4.3～6.3 kg、小白菜为2.0～2.6 kg;土壤Olsen-P含量在25～95 mg/kg时,推荐每667 m2总施磷量菜心为2.6～4.3 kg、小白菜为1.5～2.0 kg;土壤Olsen-P含量在>95 mg/kg时,推荐每667 m2总施磷量菜心不超过2.6 kg、小白菜不超过1.5 kg。
Where the vegetable fields were according to different fertility levels of different locations in Guangdong province, the leaf vegetable fertilization tests were set in the fields presented by Pakchoi （Brassica Chinesis） and Flowering Chinese cabbage （Brassica parachinensis Bailey）. In this paper, the test data of phosphorus application amount, the soil available nutrient of phosphorus, the relative yield of vegetables and relative phosphorus uptake rate were analyzed statistically, and the regression equation was also acquired. Base this, the index of soil available phosphorous on Olsen-P and the application phosphorus rate were obtained. （ 1 ）Index sufficiency and deficiency of soil available phosphorus were based by used of one model which relative yield was y=12.36ln （x）＋38.495 （the correlation coefficients was 0.685）, and the other model which relative phosphorus uptake rate was y= 18.513ln （x）＋11.517 （the correlation coefficients was 0.685）. The index of application phosphorus rate of the Flowering Chinese cabbage were based by used of one model which was y=-1.274ln （x）＋8.3839 （the correlation coefficients was 0.649）. The index of application phosphorus rate of the Pakchoi were based by used of one model which was y=-0.3871ln（x） ＋3.3416（the correlation coefficients was 0.637）. （2）According to the model were obtained the sufficiency and deficiency range which the soil effeetive phosphorus were respectively〈5 mg/kg, 5-25 mg/kg,25-95mg/kg, 〉95 mg/kg, which the relative product were respectively 50%,50%-- 75% ,75%-95% and 〉95%. （3） The proposed application phosphorus rate of Flowering Chinese cabbage and Pakchoi were respectively 6.3 mg/kg and 2.6 kg per 667 m^2, when the soil available phosphorus was 〈5mg/kg. Meanwhile, the proposed application phosphorus rate of Flowering Chinese cabbage and Pakchoi were 4.3-45.3 kg and 2.0-2.6 kg per 667 m^2, when the soil effeetive phosphorus was 5-25 mg/kg. And the former were 2.6--4.3 kg and 1.5-20 kg per 667 m^2, at the range of 25-95 mg/kg of the latter. When the soil effective phosphorus was orer〉95 mg/kg, the total application phosphorus should be less than 2.6 kg per 667 m^2 of Flowering Chinese cabbage and 1.5 kg per 667 m^2 of Pakchoi.
出处
《广东农业科学》
CAS
CSCD
北大核心
2009年第4期28-32,53,共6页
Guangdong Agricultural Sciences
基金
广东省农用地测土配方施肥补贴项目(粤财农[2008]293)
农业部公益性行业科研专项(nyhyzx07-007-6-)
广东省重大科技专项(2008A080800028)
关键词
叶菜
测土施肥
指标体系
磷素
leafy vegetables
soil testing and fertilization
index system
phosphorus
