羅 彤,李俊華,華 瑞,謝 廣,楊偉偉,陳 悅
(新疆生產(chǎn)建設(shè)兵團(tuán)綠洲生態(tài)農(nóng)業(yè)重點(diǎn)實(shí)驗(yàn)室/石河子大學(xué)農(nóng)學(xué)院,新疆石河子 832000)
不同酸性有機(jī)肥浸提液對(duì)棉花生長(zhǎng)及土壤性質(zhì)的影響
羅 彤,李俊華,華 瑞,謝 廣,楊偉偉,陳 悅
(新疆生產(chǎn)建設(shè)兵團(tuán)綠洲生態(tài)農(nóng)業(yè)重點(diǎn)實(shí)驗(yàn)室/石河子大學(xué)農(nóng)學(xué)院,新疆石河子 832000)
目的將有機(jī)肥用無(wú)機(jī)酸進(jìn)行浸提,研究有機(jī)肥浸提液結(jié)合新疆滴灌技術(shù),對(duì)土壤性質(zhì)和棉花生長(zhǎng)的影響。方法使用pH為1,3,7(清水)的磷酸和硝酸將有機(jī)肥浸提,浸提時(shí)間為2 d,施用于盆栽棉花。結(jié)果(1)硝酸和磷酸有機(jī)肥浸提液均降低了土壤pH,且相同pH的磷酸和磷酸有機(jī)肥浸提液處理的均降幅大于硝酸和硝酸有機(jī)肥浸提液處理。(2)pH為1和3的磷酸有機(jī)肥浸提液施肥處理的有機(jī)質(zhì),全氮,速效磷,速效鉀均高于對(duì)應(yīng)pH的硝酸有機(jī)肥浸提液處理;施用酸性有機(jī)肥浸提液土壤養(yǎng)分含量高于單施對(duì)應(yīng)pH酸溶液的處理。(3)硝酸和硝酸浸提液提高了棉花株高和莖粗,但磷酸浸提液處理干物質(zhì)積累高于硝酸浸提液處理。結(jié)論施用硝酸和磷酸浸提有機(jī)肥浸提液能提高土壤養(yǎng)分含量,促進(jìn)棉花生長(zhǎng)。pH 1的磷酸有機(jī)肥浸提液施肥效果最佳。
棉花;有機(jī)肥;酸性浸提液;土壤性質(zhì);滴灌
【研究意義】有機(jī)肥含有豐富的有機(jī)質(zhì)、氨基酸、蛋白質(zhì)等有機(jī)養(yǎng)分,同時(shí)也含有氮、磷、鉀等無(wú)機(jī)養(yǎng)分[1],有機(jī)肥料不僅能提高土壤質(zhì)量,增加保水保肥和供肥的能力,而且能夠直接為土壤微生物提供有機(jī)能源,促進(jìn)微生物的繁衍,改善作物株體營(yíng)養(yǎng)和根際土壤環(huán)境,在農(nóng)業(yè)可持續(xù)發(fā)展和生態(tài)環(huán)境保護(hù)方面有重要作用[2]?!厩叭搜芯窟M(jìn)展】有機(jī)肥無(wú)論是單獨(dú)施用還是與化肥配合施用都能夠持續(xù)提高土壤有機(jī)碳、氮含量;施用有機(jī)肥能顯著提高土壤速效養(yǎng)分水平,在新疆石灰性土壤上對(duì)速效磷的提高作用尤其顯著[3]。普通有機(jī)肥的施用一般以人工撒施到土壤表層,施用量較大。新疆農(nóng)業(yè)集約化、機(jī)械化程度高,人均耕地多,大田有機(jī)肥施用比例低,造成大田土壤質(zhì)量提升緩慢,難以滿足高產(chǎn)高效優(yōu)質(zhì)的農(nóng)業(yè)生產(chǎn)需求。液體肥料由于具有生產(chǎn)費(fèi)用低、養(yǎng)分含量高、易于復(fù)合、能直接被農(nóng)作物吸收、便于配方施肥和機(jī)械化施肥等諸多優(yōu)點(diǎn),越來(lái)越受到各國(guó)的普遍關(guān)注[4-6]。堆肥茶作為一種天然的液體肥料,由于成本低、生產(chǎn)工藝簡(jiǎn)單、兼具防治和肥效雙重作用而具有十分廣闊的應(yīng)用前景[7-10]。在有機(jī)農(nóng)場(chǎng)中,使用堆肥茶是一種抑制植物疾病有效的方法[11],堆肥浸提物作為液態(tài)肥施用,可降低土壤和根中的爪哇根結(jié)線蟲(chóng)數(shù)量和繁殖速度[12];有機(jī)肥液體肥料既具有化肥的速效性,又具有有機(jī)肥的緩效性[13],施入土壤后可以改善土壤結(jié)構(gòu)和環(huán)境,增加土壤中微生物的數(shù)量,提高土壤中氮、磷、鉀的含量,增加土壤肥力,并能減輕或緩解農(nóng)藥、化肥和激素性肥料對(duì)生態(tài)環(huán)境所造成的污染[14]。新疆氣候干旱少雨,水資源匱乏,水分是限制養(yǎng)分有效性和高效利用的關(guān)鍵因素,水和肥成為影響新疆綠洲灌區(qū)農(nóng)業(yè)提質(zhì)增效的主要限制因素[15]。目前,新疆推廣的大田作物膜下滴灌技術(shù)將先進(jìn)的栽培方式和滴灌技術(shù)相結(jié)合,不僅提高了農(nóng)田水肥的可控性,且為作物生長(zhǎng)創(chuàng)造了良好的水分和養(yǎng)分環(huán)境[16]。新疆有機(jī)肥資源較豐富,但區(qū)域分異較大,利用率低,需要根據(jù)各地區(qū)有機(jī)肥現(xiàn)狀和特點(diǎn)制定發(fā)展策略[17]?!颈狙芯壳腥朦c(diǎn)】新疆土壤主要為堿性的石灰性土壤,肥料當(dāng)季利用率低,限制了新疆棉花作物產(chǎn)量的提高。有機(jī)肥中易溶解的小分子有機(jī)物能減少肥料的固定,增加其有效性?;瘜W(xué)酸性物質(zhì)能降低土壤pH。研究不同酸性有機(jī)肥浸提液對(duì)棉花及土壤性質(zhì)的影響。【擬解決的關(guān)鍵問(wèn)題】通過(guò)滴施有機(jī)肥浸提液模擬滴灌,水肥結(jié)合,研究酸性浸提液有機(jī)物和化學(xué)酸性對(duì)土壤養(yǎng)分的活化作用,提高資源利用效率。
1.1 材 料
有機(jī)肥料:新疆石河子市宏新生物科技有限公司生產(chǎn)的雞糞有機(jī)肥。其有機(jī)質(zhì)含量為47.13%,全氮為3.02%,全磷為2.01%,全鉀為0.30%。
酸度設(shè)計(jì):設(shè)pH值分別1、3、7三個(gè)梯度硝酸(HN)和磷酸(HP)溶液作為浸提劑。浸提時(shí)間:設(shè)計(jì)浸提時(shí)間為2 d。恒溫箱內(nèi)保持25℃恒溫浸提,浸提液與有機(jī)肥的質(zhì)量比為5∶1,浸提容器用優(yōu)質(zhì)塑料桶,遮陰加蓋。每日每8 h攪拌一次。浸提結(jié)束后用400目尼龍網(wǎng)過(guò)濾,將硝酸浸提液(N)和磷酸浸提液(P)進(jìn)行滴施。
不同pH的酸性浸提液的有機(jī)質(zhì)含量為1.12~2.59 g/L,全氮為2.85~5.95 g/L,全磷為0.43~18.23 g/L,全鉀為1.44~1.82 g/L。
1.2 方 法
1.2.1 試驗(yàn)設(shè)計(jì)
試驗(yàn)于 2016年4月10日~10月13日在新疆石河子大學(xué)農(nóng)學(xué)院試驗(yàn)站進(jìn)行。土壤基本理化性狀為:有機(jī)質(zhì)19.67 g/kg,堿解氮62.53 mg/kg,速效磷13.02 mg/kg,速效鉀312.22 mg/kg。
盆栽試驗(yàn)盆缽內(nèi)直徑28 cm,高26 cm,每盆裝土7 kg,重復(fù)10次。土壤混勻后裝盆,澆水。每盆播10粒棉花種子,待其出苗后間苗,每盆留3株棉苗。取pH為1,3,7的酸浸提后的雞糞浸提液,以滴清水及對(duì)應(yīng)pH的酸為對(duì)照,進(jìn)行盆栽模擬滴灌試驗(yàn)。水和酸性浸提物以醫(yī)用點(diǎn)滴袋滴施,施肥量為600 mL/盆,每盆一袋,每隔10 d施肥一次,共施肥9次。保持土壤水分在田間持水量的70%~90%,稱重保持水分含量一致。調(diào)查作物的生長(zhǎng)發(fā)育情況,在不同生育時(shí)期取植株樣品,收獲時(shí)取植株樣和土樣,分析土壤有效養(yǎng)分含量。表1
表1 試驗(yàn)處理
Table 1 Experimental treatments
處理代碼Treatmentcode處理treatmentCK對(duì)照,清水H7清水浸提有機(jī)肥浸提液N1pH為1的硝酸浸提有機(jī)肥浸提液N3pH為3的硝酸浸提有機(jī)肥浸提液HN1pH為1的硝酸溶液HN3pH為3的硝酸溶液P1pH為1的磷酸浸提有機(jī)肥浸提液P3pH為3的磷酸浸提有機(jī)肥浸提液HP1pH為1的磷酸溶液HP3pH為3的磷酸溶液
1.2.2 測(cè)試指標(biāo)
烘干法測(cè)植株干物質(zhì)。全自動(dòng)定氮儀測(cè)土壤氮、光度計(jì)比色法測(cè)磷、火焰法測(cè)鉀。測(cè)定土壤pH值及其它理化性質(zhì)。
1.2.3 花鈴期棉花生物性狀的調(diào)查
采樣前1 d測(cè)量棉花株高(莖基部至棉花植株頂端生長(zhǎng)點(diǎn)的距離),莖粗,測(cè)干物質(zhì)積累。
1.3 數(shù)據(jù)處理
試驗(yàn)結(jié)果用算術(shù)平均數(shù)和標(biāo)準(zhǔn)誤表示測(cè)定結(jié)果的精密度(X±S.D.)。利用 Microsoft Excel 2003軟件、SPSS19.0 數(shù)據(jù)分析軟件進(jìn)行試驗(yàn)數(shù)據(jù)的統(tǒng)計(jì)計(jì)算、統(tǒng)計(jì)檢驗(yàn)和方差分析等。
2.1不同酸及酸性有機(jī)肥浸提液對(duì)土壤性質(zhì)的影響
2.1.1 不同酸及酸性有機(jī)肥浸提液對(duì)土壤pH的影響
研究表明,盆栽棉花施用酸及對(duì)應(yīng)有機(jī)肥酸性浸提液,均降低了土壤pH。施用酸和酸性浸提液均降低了花鈴期和吐絮期棉花土壤的pH。P1和HP1較其他處理顯著降低了花鈴期土壤pH,較CK分別下降了15.15%和20.24%,而P3和HP3卻較CK差異不顯著。N1的pH較CK降低了3.03%,差異顯著,而HN1與CK相比卻差異不顯著。H7也降低了土壤pH,但與CK差異不顯著。
吐絮期N1和HN1與CK相比,土壤pH降低了16.65%和15.68%,差異達(dá)到顯著水平,N3與CK相比,土壤pH的變化差異不顯著。P1,P3,HP1均顯著降低了土壤pH,且分別與N1,N3,HN1差異顯著,但HN3與HP3相比差異不顯著,H7與CK相比土壤pH降低了3.08%,差異顯著。表2
表2 不同酸性浸提液下土壤pH變化
Table 2 Effects of different acidic extracts on soil pH
處理Treatment花鈴期Flowering-boll吐絮期OpeningbollCK825±008a812±003aH7813±013a786±004cN1800±004b786±010cN3824±007a811±019aHN1804±008ab766±001dHN3821±006a804±009abP1700±012c676±010eP3815±008a686±003eHP1658±029d684±011eHP3821±009a792±003bc
注:每縱列數(shù)值后標(biāo)不同字母表示在5%水平差異顯著,下同
Note:Values followed by different letters in each column are significantly different at P<0.05 by Duncan test. The same as below
2.1.2 不同酸及酸性有機(jī)肥浸提液對(duì)土壤有機(jī)質(zhì)的影響
研究表明,花鈴期P3土壤有機(jī)質(zhì)含量最高,N3和P3分別較CK高11.99%和10.21%且均差異顯著。N1,H7,P1分別較CK高6.15%,5.24%和4.12%,N1和H7分別于CK差異顯著,P1及其它僅施用酸溶液的處理與CK差異不顯著。N3與HN3相比,P3與HP3相比,土壤有機(jī)質(zhì)含量提高了8.96%和9.16%,N3與HN3差異顯著,但N3和P3差異不顯著。
而在吐絮期,N3土壤有機(jī)質(zhì)含量最高,其次為P1>H7>N1>HN3>P3>HN1>CK>HP1,HP3最低。N1和P1與CK相比土壤有機(jī)質(zhì)含量提高了8.48%和19.03%,差異顯著;與HN1和HP1相比提高了4.94%和20.51%,差異顯著。N3和P3與HN3和HP3相比分別提高了12.53%和8.47%,差異均達(dá)到顯著水平。僅施用磷酸溶液時(shí),HP1和HP3有機(jī)質(zhì)含量反而比CK低了1.18%和2.73%,但差異不顯著。表3
表3 不同酸性浸提液下土壤有機(jī)質(zhì)變化
Table 3 Effects of different acidic extracts on soil organic matter
處理Treatment花鈴期Flowering-boll(g/kg)吐絮期Openingboll(g/kg)CK1967±073de2122±020deH72070±017bc2475±073aN12128±041ab2303±061bN32203±028a2532±031aHN11942±032e2199±047cdHN32022±041cde2251±022bcP12048±033bcd2526±027aP32168±038a2240±075bcHP12021±030cde2097±033eHP31986±079cde2064±056e
2.1.3 不同酸及酸性有機(jī)肥浸提液對(duì)土壤全氮的影響
施用兩種酸性有機(jī)肥浸提液均提高了土壤全氮含量,但單施酸溶液時(shí),各處理均與CK無(wú)顯著差異。花鈴期,N1和P1與HN1和HP1相比,全氮含量提高了25%和24.35%,差異顯著。N1較P1高7.21%,差異達(dá)到顯著水平。除HN1外,其他單施酸溶液處理(HN3,HP1,HP3)處理均與CK差異不顯著。N1和P1分別比HN1和HP1高7.59%和4.94%且差異顯著,各施肥處理均高于CK。H7較CK提高了12.82%,差異顯著。
但在吐絮期,P1全氮含量最高,較CK高了20.04%且差異顯著,比N1高12.94%且差異顯著。HN1低于CK。N1,N3和P3之間差異不顯著。表4
表4 不同酸性浸提液下土壤全氮變化
Table 4 Effects of different acidic extracts on soil total nitrogen
處理Treatment花鈴期(g/kg)Flowering-boll吐絮期(g/kg)OpeningbollCK079±002f080±001cdH7089±004c091±009abN1105±001a085±001bcN3085±003cd088±001bHN1084±005cde075±002dHN3079±003ef080±004cdP1097±003b096±002aP3085±004cd084±004bcHP1079±001f085±001bcHP3081±001def085±002bc
2.1.4 不同酸及酸性有機(jī)肥浸提液對(duì)土壤堿解氮的影響
研究表明,花鈴期和吐絮期的P1處理堿解氮含量顯著高于其他處理,較CK分別提高了241.28%和46.42%,均為兩個(gè)生育期最高?;ㄢ徠谄渌幚黹g差異不顯著,而在吐絮期,P1>H7>N3,其它單施酸性溶液與CK間差異不顯著。表5
表5 不同酸性浸提液下土壤堿解氮變化
Table 5 Effects of different acidic extracts on soil alkaline nitrogen
處理Treatment花鈴期(mg/kg)Flowering-boll吐絮期(mg/kg)OpeningbollCK6253±352b5600±280deH76253±161b6440±370bN17700±140b5927±080cdN36300±370b6319±210bcHN15973±428b5647±081deHN36300±140b5460±280eP121373±3245a8633±352aP36066±161b5740±140deHP15927±081b5880±140deHP35973±162b5927±162cd
2.1.5 不同酸及酸性有機(jī)肥浸提液對(duì)土壤速效磷的影響
研究表明,施用磷酸浸提液和磷酸可顯著提高兩個(gè)生育期土壤中速效磷含量,且顯著高于其他處理。花鈴期施用磷酸浸提液和磷酸溶液的處理較CK均顯著提高了土壤速效磷含量,且差異顯著,但P1與HP1差異不顯著,可見(jiàn)土壤速效磷主要來(lái)自磷酸浸提劑溶液。吐絮期除HN1>N1外,規(guī)律與花鈴期相似。施肥處理速效磷含量隨浸提劑pH升高而降低,這與不同pH的磷酸浸提劑中的磷含量不同有關(guān)。表6
表6 不同酸性浸提液下土壤速效磷變化
Table 6 Effects of different acidic extracts on soil available phosphorus
處理Treatment花鈴期(mg/kg)Flowering-boll吐絮期(mg/kg)OpeningbollCK1302±128d1121±231fH75307±751d3243±467fN114943±1822d6934±845efN37027±1428d6003±367efHN11614±233d11919±732eHN32540±384d1460±313fP1464515±11126a301997±3057aP3191774±5693b283671±5334bHP1457081±35098a254052±8486cHP362748±6095c49497±2793d
2.1.6 不同酸及酸性有機(jī)肥浸提液對(duì)土壤速效鉀的影響
研究表明,兩個(gè)生育期施用有機(jī)肥浸提液的處理的速效鉀含量明顯高于其他處理?;ㄢ徠诘腜1和P3分別比N1和N3高18.37%和29.59%;P1和P3分別比CK提高了243.58%和181.73%,差異均達(dá)到顯著水平。N1和N3分別較HN1和HN3提高了256.67%和317.12%,差異顯著。P1和P3分別較HP1和HP3提高了83.11%和287.22%,差異顯著。吐絮期N1和N3較HN1和HN3分別提高了170.37%和232.2%,P1和P3分別較HP1和HP3提高了164.92%和128.96%,差異均達(dá)到顯著水平;P3與N3較CK平均提高了164.06%。P1最高,分別比N1和CK提高了31.98%和267.5%,差異達(dá)到顯著水平。兩個(gè)生育期均為P1速效鉀含量最高,N1次之。表7
2.2不同酸及酸性有機(jī)肥浸提液對(duì)棉花植株的影響
研究表明,施用有機(jī)肥浸提液和施用pH為1的硝酸均提高了棉花株高,而單施磷酸的HP1和HP3處理卻與CK無(wú)顯著差異;施肥處理間除N1外,處理間差異不顯著。HN1和P3的莖粗與CK相比分別提高了21.95%和14.63%,差異顯著,其它施肥處理之間差異不顯著。
HN1與P1的干物質(zhì)積累較CK提高了59.78%和46.41%。差異顯著;N3較CK提高了60.97%,差異也達(dá)到顯著水平。其他處理與CK無(wú)顯著差異。表8
表7 不同酸性浸提液下土壤速效鉀變化
Table 7 Effects of different acidic extracts on soil available potassium
處理Treatment花鈴期(mg/kg)Flowering-boll吐絮期(mg/kg)OpeningbollCK31223±1496e32056±2630dH775805±9557c93647±2585bN196309±5407b89177±3263bcN362724±2017d86159±2063cHN127064±362ef32985±1223dHN331927±2596e32520±7532dP1114005±4986a117622±3068aP381287±1715c83895±4738cHP125783±1653ef35423±4085dHP322707±1118f36699±4181d
表8 不同酸及酸性有機(jī)肥浸提液下棉花植株變化
Table 8 Effects of different acid and acid organic fertilizer extracts on cotton plants
處理Treatments株高(cm)Plantheight莖粗(cm)PlantStemdiameter干物質(zhì)(g/plant)PlantdrymatterCK2817±478c041±007c1937±565bcdeH74433±693a046±005abc2644±579abN13740±367b045±006abc2465±599abcdN34300±572a046±004abc3118±460aHN13988±599ab050±006a3095±375aHN32908±555c044±003abc1619±068deP14096±710ab046±006abc2836±425aP34078±265ab047±004ab2555±767abcHP12824±461c042±007bc1569±501eHP32667±168c042±003bc1716±214cde
施用酸性有機(jī)肥浸提液后,均降低了土壤pH,提高了土壤養(yǎng)分含量,這與和徐大兵等[10]研究結(jié)果相似。土壤pH隨著浸提劑的pH降低而降低,且磷酸對(duì)土壤pH的降低幅度大于硝酸。P1土壤養(yǎng)分高于N1,有機(jī)質(zhì)反之,可能是因?yàn)榱姿釣橹袕?qiáng)酸,相同pH時(shí),隨著中和作用進(jìn)行,H+不斷釋放,在酸的分解作用下,對(duì)有機(jī)質(zhì)分解作用強(qiáng)于硝酸,這與陳漢龍等[18]研究結(jié)果相似。
花鈴期N1全氮含量高于P1,而吐絮期反之,是因?yàn)橄鯌B(tài)氮的分解作用。堿解氮,速效磷,速效鉀均為P1含量最高,磷酸分別增加了HP1和HP3的速效磷含量,而硝酸對(duì)N1吐絮期的全氮含量增加卻不明顯,可能是因?yàn)樗釋?duì)土壤氮的淋洗[19]。P1處理對(duì)土壤養(yǎng)分含量的提升效果最優(yōu)。
N1,N3,P1,P3,H7處理速效鉀含量均與HN1,HN3,HP1,HP3,CK處理差異顯著,說(shuō)明有機(jī)肥浸提液是提高土壤養(yǎng)分的主要因素。
棉花植株的株高CK,HN3,HP1,HP3顯著低于其他處理,說(shuō)明氮是影響株高的主要因素[20]。莖粗為HN1最高,之所以花鈴期出現(xiàn)棉花株高HN1>P1>N1,是因?yàn)槭┓室褐蠳O3-N含量高[21]。施用有機(jī)肥浸提液處理的干物質(zhì)均高于單施酸性溶液,但施肥處理間差異不顯著。HN1處理的莖粗和干物質(zhì)均較高,可能是因?yàn)槿芤褐械枯^高的緣故。
在盆栽棉花中模擬新疆大田滴灌,施用有機(jī)肥浸提液后,提高了土壤養(yǎng)分含量,降低了土壤pH:其中,P1和HP1的pH與CK相比平均降低了16.13%。施用有機(jī)肥浸提液還增加了棉花干物質(zhì)積累量,P1較CK干物質(zhì)積累量增加了47.65%。pH為1的磷酸和硝酸浸提有機(jī)肥浸提液對(duì)提升土壤肥力有較好效果:有機(jī)質(zhì),全氮,速效磷,速效鉀分別比單施磷酸和硝酸平均提高了10.71%,11.61%,18.26%,15.88%,66.44%,說(shuō)明提高土壤養(yǎng)分的主要作用是對(duì)有機(jī)肥的浸提成分而非浸提劑,土壤速效鉀含量提高尤為明顯。不同pH的浸提劑中,pH為1的有機(jī)肥浸提液對(duì)土壤肥力和棉花生長(zhǎng)提升效果最佳,而浸提劑pH同為1時(shí),磷酸有機(jī)肥浸提液和硝酸有機(jī)肥浸提液相比,磷酸有機(jī)肥浸提液對(duì)降低土壤pH,提高土壤養(yǎng)分含量,促進(jìn)棉花生長(zhǎng)有更好的效果。
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EffectsofDifferentAcidicExtractsofOrganicFertilizersonCottonGrowthandSoilProperties
LUO Tong,LI Jun-hua,HUA Rui,XIE Guang,YANG Wei-wei,CHEN Yue
(TheKeyLaboratoryofOasisEco-agriculture,XinjiangProductionandConstructionCorps/CollegeofAgronomy,ShiheziUniversity,XinjiangShihezi832003,China)
ObjectiveOrganic fertilizer has the effect of improving soil properties and improving soil fertility, but it was inconvenient for large-scale fertilization. Xinjiang drip irrigation technology has been perfected, but the proportion of organic fertilizer application was rather lower. In this study, organic fertilizer will be extracted with inorganic acid, organic fertilizer extract combined with drip irrigation in Xinjiang to explore its effect on soil properties and cotton growth.MethodThe organic fertilizer was extracted with phosphoric acid and nitric acid with pH 1, 3 and 7 (water), and the extraction time was 2 days, and then they were applied to the potted cotton.ResultThe results showed that: (1) Both the nitric acid and its extracts of organic fertilizer reduced the pH of the soil, and the same pH of phosphoric acid and phosphoric acid organic fertilizer extract treatments were greater than nitric acid and nitric acid organic fertilizer extract treatments. (2) The soil organic matter, total nitrogen, available phosphorus and available potassium in the phosphate organic fertilizer extract treatments whose pH was 1 and 3 were higher than that of the same pH treatments of nitric acid organic fertilizer extract. The soil nutrient in the treatments of the application of acidic organic fertilizer extract was higher than that of the application of the same pH of acid. (3) Nitric acid and nitric acid leach extract treatments increased the plant height and plant dry matter of cotton, but the dry matter accumulation of phosphate extract treatment was higher than that of nitrate extract treatment.ConclusionIn conclusion, the application of nitric acid and phosphoric acid organic fertilizer extract improved soil nutrients content and promoted the growth of cotton. pH 1 phosphate fertilizer extract had the best effects.
cotton; organic fertilizer; acid extract; soil properties; drip irrigation
Li Jun-hua (1972-), Male, Birtheplace: Hanzhong, Shanxi Province, Professor,Research field: New fertilizer and modern fertilization techniques research. (E-mail)ljh630703@163.com
S141.3;S145.2
A
1001-4330(2017)10-1839-08
10.6048/j.issn.1001-4330.2017.10.009
2017-07-14
國(guó)家自然科學(xué)基金項(xiàng)目“滴施有機(jī)肥酸性浸提物活化石灰性土壤養(yǎng)分的時(shí)空效應(yīng)及機(jī)理研究”(31660598);“有機(jī)肥肥際微域微生物分布特征及驅(qū)動(dòng)機(jī)制研究”(31360501)
羅彤(1992-),男,河北石家莊人,碩士研究生,研究方向?yàn)樾滦头柿吓c現(xiàn)代施肥技術(shù),(E-mail)995428404@qq.com
李俊華(1972-),男,陜西漢中人,教授,研究方向?yàn)樾滦头柿吓c現(xiàn)代施肥技術(shù),(E-mail)ljh630703@163.com
Supported by: The National Natural Science Foundation of China "Study on temporal and spatial effects and mechanisms of drip activated organic acid extracts on activated calcareous soil nutrients" (31660598) and "Study on the distribution characteristics and driving mechanism of microorganisms in rhizosphere soil of organic manure" (31360501)