摘要
以立架甜瓜为材料,设置0、150、225、300、375、450 kg·hm^(-2)6个施磷水平的田间试验,研究不同供磷水平对立架甜瓜干物质和磷素吸收积累、产量以及磷肥利用效率的影响.结果表明:与对照(0 kg·hm^(-2))相比,增施磷肥提高了立架甜瓜各器官和整株干物质及磷素吸收积累,尤其是150、225 kg·hm^(-2)处理最高,成熟期整株干物质和磷素吸收积累量分别较对照增加了19.9%和26.3%、23.0%和26.3%;立架甜瓜干物质和磷素积累随生育期的推进呈增加趋势,生育前期主要在叶中分配,后期主要在果实中分配;磷肥表观利用率、农学效率和偏生产率均随施磷量增加而降低,150 kg·hm^(-2)处理最高,分别为11.1%、152.9 kg·kg^(-1)和476.3 kg·kg^(-1);施用磷肥促进了立架甜瓜产量的提高,150和225 kg·hm^(-2)处理显著高于对照,分别增产47.3%和39.7%.伸蔓期和果实膨大期是立架甜瓜磷肥施用的关键时期,结合产量与磷肥利用效率,150~225 kg·hm^(-2)(P2O5)的供磷水平是新疆喀什地区立架甜瓜适宜施磷量.
A field experiment applying six rates of P fertilizer （P2O5 0, 150, 225, 300, 375 and 450 kg ·hm^-2, respectively） was conducted to investigate the effects of P fertilization on dry matter accumulation （DMA）, P uptake and accumulation （PUA） and P use efficiency （PUE） of trelliscultivated melon. Results showed that, P application increased DMA and PUA, for 150 and 225 kg P2O5·hm^-2 treatments, being 19.9% and 26.3%, 23.0% and 26.3% higher than that in no P fertilizer treatment at fruiting stage. With plant growth, DMA and PUA of different organs and the whole plant gradually increased. DMA and PUA were mainly distributed in the leaves during the early stage of the growth and in the fruit during the latter stage. P application decreased the recovery efficiency of applied P （REr.）, agronomic efficiency of applied P （AEp） and partial factor productivity of applied P （PFp）. At 150 kg ·hm^-2 P application rate, the maximum REp, AEp and PFp were 11.1%, 152.9 kg·kg^-1 and 476.3 kg·kg^-1, respectively. Compared with no P fertilizer treat-ment, melon yields of 150 and 225 kg P2O5 · hm^-2 treatments increased by 47.3% and 39.7%, respectively. In summary, the vining stage and fruit expanding stage were the key periods for P application in trellis-cultivated melon system. Based on synthesized economic yield and P fertilizer efficiency, the recommendation of P fertilizer for trellis-cultivated melon is 150-225 kg P2O5· hm^-2 under the climatic condition of the experimental area.
出处
《应用生态学报》
CAS
CSCD
北大核心
2016年第2期511-518,共8页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目(31460542)
新疆维吾尔自治区高校科研计划科学研究重点项目(XJEDU2014I013)
新疆维吾尔自治区土壤学重点学科项目资助~~
关键词
立架甜瓜
磷肥效率
磷素吸收
干物质积累
trellis-cultivated melon
P fertilizer efficiency
P uptake
dry matter accumulation
