乐昌超级稻测土施肥技术指标体系研究  

Techno-index System of Fertilization according to Soil Diagnosis for Super-rice in Lechang Guangdong

作　　者：罗群胜 黄旭[2] 

机构地区：[1]乐昌市农业技术推广总站,广东乐昌512219 [2]广东省农业科学院农业资源与环境研究所,广东广州510642

出　　处：《热带农业工程》2014年第3期11-18,共8页Tropical Agricultural Engineering

基　　金：农业部测土配方施肥补贴项目(No.农办财[2008]34)

摘　　要：在不同肥力水田设置超级稻田间肥料试验,对施肥量、土壤有效养分含量(碱解氮、有效磷、有效钾)和超级稻相对产量等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,以此初步建立乐昌超级稻土壤有效养分丰缺指标和不同肥力土壤的推荐施肥量指标。结果表明:超级稻的碱解氮、有效磷、速效钾丰缺指标的数学模型分别为:y(相对产量)=27.874lnx-44.909(R2=0.305 4,n=16)、y(相对产量)=13.533lnx+39.461(R2=0.6321,n=16)、y(相对产量)=16.734lnx+13.701(R2=0.8142,n=16)。超级稻的推荐施氮、磷、钾肥总量数学模型分别为:y=-7.007 6lnx+45.162(R2=0.459 1,n=16)、y=-2.082 7lnx+12.751(R2=0.618 3,n=16)、y=-6.446 4lnx+43.613(R2=0.305 4,n=16)。并根据推荐施肥量数学模型计算出乐昌市超级稻不同土壤有效养分含量的推荐施肥总量。当土壤碱解氮含量分别为:<30.1、30.1-73.8、73.8-151.3、>151.3mg/kg时,推荐的总施氮量分别为:>21.3、21.3-15.0、15.0-10.0、<10.0 kg/667 m2;当土壤有效磷含量为:<2.2、2.2-13.8、13.8-60.6、>60.6 mg/kg时,推荐的总施磷量分别为:>8.9、8.9-6.3、6.3-4.2、<4.2 kg/667 m2;当土壤有效钾含量分别为:<8.8、8.8-39.0、39.0-128.8、>128.8 mg/kg时,推荐的总施钾量分别为:>29.6、29.6-20.0、20.0-12.3、<12.3kg/667m2。The super-rice fertilization tests were set in the paddy fields of different fertility levels and different locations. In this paper the test date of the rate of fertilizer application amounts（N,P2O5,K2O）, the soil available nutrient of nitrogen, phosphorus and potassium, the relative yield of super-rice were analyzed statistically, and the regression equations were also acquired. The proper mathematical models based on regression equations, and the richness or deficient status index by recommended about the soil available nutrient content and the total doses of fertilizer for super-rice in Lechang were obtanted. Results showed the regressions equation index for alkali-hydrolysable nitrogen, available phosphorus and available potassium were as follows： y（relative yield） = 27.874ln（x）-44.909（R^2=0.305 4,n=16）, y（relative yield）=13.533ln（x）＋39.461（R^2=0.305 4,n=16）, y（relative yield）=16.734 1ln（x）＋13.701（R^2=0.814 2,n=16）. The regression equations of the total doses of nitrogen（N）, phosphorus（P2O5） and potassium（K2O） for super-rice were as follow： y=-7.007 6ln（x）＋45.162（R^2=0.459 1, n=16）, y=-2.082 7ln（x）＋12.751（R^2=0.618 3,n=16）, y=-6.446 4ln（x）＋43.613（R^2=0.305 4,n=16）. The total doses of nitrogen（N） were as follow： 〉21.30, 21.30-15.01, 15.01-9.98, 〈9.98 kg/667 m^2, when alkali-hydrolysable nitrogen in the soil were：〈 30.11, 30.11-73.84, 73.84-151.31, 〉151.31 mg/kg; The total doses of phosphorus（P2O5） were as follow：〉8.88, 8.88-6.27, 6.27-4.23, 〈4.23 kg/667 m^2, when available phosphorus in the soil were：〈 2.18,2.18-13.82, 13.82-60.58, 〉60.58 mg/kg; The total doses of potassium（K2O） were as follow： 〉29.63,29.63-19.99, 19.99-12.29, 〈12.29 kg/667 m^2, when available potassium in the soil were： 〈8.75,8.75-38.98, 38.98-128.81, 〉128.81 mg/kg.

关 键 词：超级稻 施肥 指标体系 测土配方施肥 

分 类 号：S511[农业科学—作物学]