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調(diào)虧灌溉對冬小麥氮,、磷,、鉀養(yǎng)分吸收與利用的影響
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國家自然科學基金面上項目(51079153),、國家現(xiàn)代農(nóng)業(yè)小麥產(chǎn)業(yè)技術體系專項經(jīng)費項目(CARS—3—1—30),、河南省科技攻關項目(科技攻關—2015)、國家自然科學基金青年基金項目(51309227),、中國農(nóng)業(yè)科學院科技創(chuàng)新工程項目和河南商丘農(nóng)田生態(tài)系統(tǒng)國家野外科學觀測研究站觀測研究及數(shù)據(jù)信息系統(tǒng)建設項目


Effect of Regulated Deficit Irrigation on Uptake and Utilization of Nitrogen, Phosphorus and Potassium for Winter Wheat
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    摘要:

    為研究調(diào)虧灌溉(Regulated deficit irrigation, RDI)對冬小麥氮,、磷、鉀養(yǎng)分吸收與利用的影響,,采用防雨棚下盆栽方法,,于2012—2013年和2013—2014年在黃淮海平原河南新鄉(xiāng)連續(xù)進行了2a試驗研究。冬小麥設置5個水分調(diào)虧階段:三葉—越冬(I),、越冬—返青(II),、返青—拔節(jié)(III)、拔節(jié)—抽穗(IV)、抽穗—成熟(V),;每個生育階段設置3個水分調(diào)虧度:輕度調(diào)虧(L),、中度調(diào)虧(M)和重度調(diào)虧(S),相對含水率(占田間持水量的百分數(shù))分別為60%~65% FC(田間持水量),、 50%~55% FC和40%~45% FC,;對照(CK)相對含水率為75%~85% FC。結(jié)果表明,,越冬—返青的輕度(60%~65% FC)或中度(50%~55% FC)水分調(diào)虧復水后有利于氮,、磷養(yǎng)分向籽粒運轉(zhuǎn)與分配,而水分過多或過度虧水則導致養(yǎng)分過多分配至莖,、葉等營養(yǎng)器官,;抽穗—成熟期的適度調(diào)虧(50%~55% FC)有利于提高籽粒中氮、磷的含量,,因而提高籽粒產(chǎn)量,,改善籽粒品質(zhì);返青—拔節(jié)及其以前階段的輕度(60%~65% FC),、中度(50%~55% FC)水分調(diào)虧有利于提高氮,、磷養(yǎng)分利用效率,但水分調(diào)虧不利于鉀素利用效率的提高,。水分調(diào)虧,,尤其是越冬期的輕度調(diào)虧(60%~65% FC)或拔節(jié)期的中度水分調(diào)虧(50%~55% FC)可顯著增強作物對土壤氮素的吸收利用能力,從而減少肥料氮在土壤中的殘留量,。說明RDI可有效調(diào)控作物養(yǎng)分吸收與分配,實現(xiàn)節(jié)水,、節(jié)肥,、高產(chǎn)、優(yōu)質(zhì)和高效目標,。

    Abstract:

    A better understanding of the effects of irrigation model on soil nutrients is important to agronomists and farmers for developing management packages with high-yield, good-quality and low water and fertilizer applications. A pot-based experiment with winter wheat cultivar (Triticum aestivum L.) was conducted under rainproof shelter during the growing seasons of 2012—2013 and 2013—2014 to investigate the effects of regulated deficit irrigation (RDI) on nitrogen, phosphorus and potassium uptake and utilizations in Xinxiang City of Henan Province, in the Huang-Huai-Hai Plain of China. The experimental treatments included five growth stages (I, three leaves-winter;II, winter-beginning of spring growth;III, beginning of spring growth-stem elongation;IV, stem elongation-ear emergence and V, ear emergence-maturity) and three levels of water deficit (60%~65% FC (field capacity), 50%~55% FC, and 40%~45% FC for light, moderate, and severe deficit, respectively) were laid out in a randomised complete block design with three replicates. A non-deficit control (CK) (75%~85% FC from sowing to maturity) with three replications was also included. The results indicated that light or moderate water deficit at winter-beginning of spring growth stage benefited nutrients translocation and distribution in the grains, and excess of water in the soil or inapplicable water deficit resulted in increase of proportion of nutrients accumulation in vegetative organs. Appropriate water deficit (50%~55% FC) during ear emergence-filling stage was able to increase nitrogen and phosphorus contents in grains, and then increase grain yield and improve quality. Light water deficit or moderate water deficit during beginning of spring growth-stem elongation stage was favorable to improve nitrogen and phosphorus use efficiencies, but water deficit at any stages was unfavorable to increase potassium use efficiency. The results also showed that appropriate water deficit (especially light water deficit at winter stage or moderate water deficit at stem elongation stage) significantly enhanced nitrogen absorption ability of plants from soil, and reduced nitrogen residue in soil. Therefore, it was suggested that RDI can effectively regulate nitrogen, phosphorus and potassium uptake, and promote water and fertilizer savings, high yield, good quality and high efficiency of winter wheat.

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孟兆江,段愛旺,高陽,王曉森,申孝軍,常曉.調(diào)虧灌溉對冬小麥氮,、磷、鉀養(yǎng)分吸收與利用的影響[J].農(nóng)業(yè)機械學報,2016,47(12):203-212. Meng Zhaojiang, Duan Aiwang, Gao Yang, Wang Xiaosen, Shen Xiaojun, Chang Xiao. Effect of Regulated Deficit Irrigation on Uptake and Utilization of Nitrogen, Phosphorus and Potassium for Winter Wheat[J]. Transactions of the Chinese Society for Agricultural Machinery,2016,47(12):203-212.

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  • 收稿日期:2016-04-21
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  • 在線發(fā)布日期: 2016-12-10
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