棉花学报2023，Vol.35Issue(5)：378-397,20.DOI:10.11963/cs20230025
磷肥滴施对膜下滴灌棉田土壤磷形态及磷肥利用率的影响
Effects of drip application of phosphorus fertilizer on soil phosphorus morphology and use efficiency in cotton field with drip-irrigation under plastic-film mulch
摘要
Abstract
[Objective]Based on the integrated technology of water and fertilizer,the effects of different phosphorus(P)application methods were studied,so as to provide a basis for the rational application of P fertilizer in cotton field with drip-irrigation under plastic-film.[Method]The experiment was carried out in Xinjiang cotton field in 2021.Xinluzao 63 was used as the object,and four treatments were set up,CK:no P application;MAP-B:basal application of monoammonium phosphate(MAP),total amount of P2O5 was 100 kg·hm-2(same as below);MAP-D:basal application of 50％MAP+drip application of 25％MAP at bud stage and 25％at early flowering and boll development stage;MAP-DS:MAP-D+drip application of polyglutamic acid of 50％at bud stage and 50％at early flowering and boll development stage.Soil P content,inorganic P content in different forms,soil P adsorption-desorption characteristics,P use efficiency,and seed cotton yield of different treatments were compared and analyzed.[Result]P application could increase the available P content and total P content in 0-40 cm soil layer at the seedling stage and flowering and boll development stage,and the content of available soil P under MAP-D and MAP-DS treatment was significantly higher than that of other treatments at flowering and boll development stage.Compared with basal application of P(MAP-B),drip application significantly increased the content proportion of dicalcium phosphate(Ca2-P),octa-calcium phosphate(Ca8-P)and aluminum bounded phosphate(Al-P),and reduced the proportion of apatite(Ca10-P)at the flowering and boll development stage.The isothermal adsorption and desorption curves of P in 0-40 cm soil layers under different treatments at the seedling stage and flowering and boll development stage showed similar trend,that is,with the increase of P concentration in equilibrium solution,the soil P adsorption increased rapidly at first and then slowly,and with the increase of P concentration in standard solution,the P desorption rate decreased rapidly at first and then tended to be stable.Compared with CK,the seed cotton yield of P application treatments increased.The P use efficiency and seed cotton yield under drip application of P were higher than that of basal application of P(MAP-B).MAP-DS treatment showed the highest P use efficiency and the highest seed cotton yield(6 829.75 kg·hm-2).[Conclusion]Drip application of P fertilizer combined with polyglutamic acid under the integration of water and fertilizer in Xinjiang cotton planting region is more conducive to the absorption and utilization of soil P for Xinluzao 63,and further improves the P use efficiency and seed cotton yield.关键词
棉田/水肥一体化/无机磷形态/吸附/解吸/磷肥利用率/聚谷氨酸Key words
cotton field/integration of water and fertilizer/inorganic phosphorus form/adsorption/desorption/phosphorus use efficiency/polyglutamic acid引用本文复制引用
马悦,张应榕,王娟红,张曼,车庆轩,陈波浪..磷肥滴施对膜下滴灌棉田土壤磷形态及磷肥利用率的影响[J].棉花学报,2023,35(5):378-397,20.基金项目
新疆维吾尔自治区重点研发专项(2022B02033) （2022B02033）
新疆维吾尔自治区杰出青年项目"供磷强度和根系空间协同调控根际过程提高棉花磷效率的机制" （）
新疆维吾尔自治区"天山英才"青年科技拔尖人才项目(2022TSYCCX0085) （2022TSYCCX0085）
新疆维吾尔自治区重大科技专项(2022A02007) （2022A02007）
国家自然科学基金(32360793,31960629) （32360793,31960629）
