以国抗棉GK12号为供试材料,以等养分量复合肥作对照,研究不同控释肥施用量对大田棉花生长和土壤肥力的影响.结果表明,控释肥处理的棉花株高、茎粗、叶面积均较普通复合肥具有优势.控释肥对大田果枝数、桃数影响显著.在施氮量为75 kg hm-2和150 kg hm-2条件下,控释肥处理的棉花产量较复合肥处理分别增加18.9％和13.6％.在多个棉花生育期,与复合肥处理相比,控释肥处理提高了0～ 20 cm 和20 ～ 40 cm土层硝态氮含量,未对土壤的铵态氮含量造成显著影响,土壤中有效磷和速效钾含量与普通复肥处理间未出现显著的差异.
EFFECTS OF APPLICATION RATES OF CONTROLLED RELEASE FERTILIZERS ON COTTON GROWTH AND SOIL FERTILITY
A field experiment of controlled release fertilizers (CRFs) on cotton was carried out to study effects of application rate of CRFs on cotton (Guokang 12) growth and soil fertility with the application of common compound fertilizers (CCFs) as control for comparison.Results show that CRFs significantly increased plant height,culm diameter,leave area and the numbers of fruit spurs and bolls of the cotton.When N 75 kg hm-2 and N 150 kg hm-2 was applied,yield of the cotton in Treatment CRFs was 18.9％ and 13.6％ higher than that in CK (CCFs),respectively.Besides,CRFs also significantly increased the content of NO3--N in the soil of the 0 ～ 40 cm soil layer,but didn' t affect much the content of NH4+ ♂-N in the soil.No significant difference was observed in content of available P and K between Treatments CRFs and CCFs.
国家科技期刊平台
NSTL
万方数据
维普
