不同硝酸钙和氯化钠浓度处理土壤对番茄植株养分吸收的影响

Effects on nutrient absorption of tomato under soil disposed by different concentration of Ca(NO_3)_2 and NaCl

试验以Ca NO3 2和NaCl按5∶1的比例均匀混合设计0、0.1%、0.3%、0.5%、0.7%的盐浓度5个处理,模拟宁夏不同日光温室的土壤含盐量,以番茄为试验材料,研究了不同浓度盐分对番茄养分吸收的影响.结果表明,在同一生育期内,随着盐分浓度的增大,番茄植株对养分吸收明显减少.在不同的生育期内,对照处理对氮磷钾钙镁的吸收在结果初期达到最大值;0.1%盐分处理对氮磷钾的吸收在结果初期达到最大值,而对钙镁的吸收在收获末期达到最大值;在高盐处理 0.3%以上 中,番茄植株对氮磷钾钙镁的吸收在收获末期达到最大值.

Modeling characteristics of soil salinization in protected cultivation by adding mixed salt of calcium nitrate and sodium chloride (5∶1) at 0,0.1%,0.3%,0.5%,0.7% five management in dry earth.The author researches the effects on nutrient absorption of tomato.The result showed that,in same growth phase,the absorbable amount of nitrogen (N),phosphorus (P),potassium (K),calcium (Ca) and magnesium (Mg) of tomato plant were decreased along with enhancement of soil salt.In different growth phase,the absorbable amount of nitrogen (N),phosphorus (P),potassium (K),calcium (Ca) and magnesium (Mg) of tomato plant were maximum in the early days of fructification under the control management.The absorbable amount of nitrogen (N),phosphorus (P) and potassium (K) of tomato plant were maximum in the early days of fructification,but the absorbable amount of calcium (Ca) and magnesium (Mg) of tomato plant reached maximum in the phase of anaphase of fructification under 0.1% salt management.The absorbable amount of nitrogen (N),phosphorus (P),potassium (K),calcium (Ca) and magnesium (Mg) of tomato plant reached maximum in the phase of anaphase of fructification under above 0.3% salt management.