減量施肥條件下腐植酸保水劑對玉米產(chǎn)量及白漿土養(yǎng)分含量的影響
[Abstract]:In order to reveal the application effect of humic acid water-retaining agent (WA) under reduced fertilization, the total amount of (Tf), fertilizer was applied to reduce N fertilizer by 20% (Df-N 20%) and phosphorus fertilizer by 20% (Df-P 20%). Reduce potassium fertilizer by 20% (Df-K20%) and add WA to it (Tf-WA,Df-N 20-WA-Df-P20-WA-Df-K 20%-WA), To explore the effect of WA on maize yield and soil nutrient content under reduced fertilization. The results showed that the emergence rate of maize, the number of leaves at grain filling stage, plant height, leaf area per leaf, grain number per ear and yield of maize treated with different fertilization treatments were significantly higher than those of CK. The corn yield was increased significantly by adding WA to 20% Df-K treatment, and the corn yield was significantly increased by 9.4% and 13.4%, respectively. Under the condition of 20% Tf,Df-P, the yield of maize was significantly decreased by applying WA. The soil pH value of Df-P 20 + Df-P 20%-WA treatment was significantly lower than that of jointing stage, and the soil pH value of Df-P 20 + Df-P 20%-WA treatment was significantly lower than that of jointing stage, and the soil pH value was significantly lower than that of jointing stage. The acidification process of alpine soil is aggravated; Compared with jointing stage, the content of organic matter in aluminous soil treated with Df-K20%,Tf-WA,Df-P 20 and -WAF K 20%-WA at harvest stage was significantly higher than that at jointing stage. The other treatments were not conducive to the accumulation of organic matter components, among which the Df-N 20%-WA treatment had the largest consumption of organic matter, which reduced the content of organic matter by 28.3%. Compared with the jointing stage, the total nitrogen content of the other treatments decreased in varying degrees, except that the total nitrogen content in the CK clay soil remained stable at harvest stage. From the point of view of the decrease, the decreasing trend of the total nitrogen content could be alleviated in the 20% Tf,Df-K treatment combined with the application of WA. The addition of Df-N 20% Df-P 20% increased the utilization of total nitrogen. On the basis of different fertilization, the application of WA had no regular effect on the content of alkali-hydrolyzed nitrogen, but the treatment of Df-K 20%-WA could alleviate the decreasing trend of alkali-hydrolyzed nitrogen to some extent and increase the content of available phosphorus in alpine soil. However, 20% Df-K treatment could effectively promote the accumulation of alkali-hydrolyzed nitrogen in aluminous soil. With the exception of corn filling stage, the available phosphorus content of white soil treated with WA was significantly higher than that of no WA treatment, and the available potassium consumption of clay soil with adding WA was beneficial to the consumption of available potassium in the mature and harvest period of maize. On the premise of reducing nitrogen fertilizer by 20% or potassium fertilizer by 20%, the application of WA can increase maize yield, the former is not conducive to the accumulation of organic matter in albic soil, and the process of soil acidification can be accelerated whether or not the application of WA, reduces 20% of phosphate fertilizer. Fertilization could promote the consumption of total nitrogen, but had no regular effect on the content of alkali-hydrolyzed nitrogen.
【作者單位】: 吉林農(nóng)業(yè)科技學(xué)院農(nóng)學(xué)院;吉林省潤禾灘地農(nóng)業(yè)開發(fā)有限公司;
【基金】:吉林農(nóng)業(yè)科技學(xué)院青年基金項目(吉農(nóng)院合字[2014]第207號,吉農(nóng)院合字[2015]第206號);吉林農(nóng)業(yè)科技學(xué)院重點學(xué)科培育項目(吉農(nóng)院合字[2015]第X006號,吉農(nóng)院合字[2015]第X009號) 國家自然科學(xué)基金項目(41401251)
【分類號】:S158;S513
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