Development and the components of exudates and bleaching sap in the root of cucumber seedlings were examined to elucidate the response of the rhizosphere to CO2 enrichment treatments (one time in the morning and twice in the morning and afternoon).

為探討溫室蔬菜CO2施肥的根際效應(yīng)，以黃瓜幼苗為試材，研究了CO2施肥（上午施肥/上jizzjizzjizz亚洲日本、下午施肥；施肥濃度/對照濃度(950±50)/(350±50)μmol/mol CO2）對根系生長及分泌物和傷流液組成的影響久久久精品国产亚洲Av。

Single-fertilizer effect models as well as 1 fertilization model and 3 balance fertilization parameters for the glebe experiment area are produced.

本研究在田間施肥量試驗的基礎(chǔ)上為水田試驗區(qū)配出了單一肥料效應(yīng)模型6個最近中文字幕免费大全下载，施肥模型1個，平衡施肥參數(shù)3項欧美未满十八岁；為旱田試驗區(qū)配出了單一肥料效應(yīng)模型6個91免费视频网，施肥模型1個，平衡施肥參數(shù)3項在线观看的黄色网站欧美日本。

The contents of N, P, K in leaves were examined by regular leaf analysis. The results showed that the N content was higher in leaf blade than in leafstalk. N content in leaf was gradually reduced along with the vine growth. N, F, K fertilized at 20 to 40 cm soil layers significantly increased N content in leaf. But N content in leafstalk was less affected by N fertilization depth and growing season. P content was higher in leafstalk than in leaf blade. Less change of P content was noticed in leaf along with vine growth. However, N, P, K fertilized at 40 to 60 cm soil layers significantly promoted P in both leaf blade and leafstalk. K content in leafstalk was much higher than in leaf Wade. No obvious influence was noticed by fertilizing depth. But K content in leafstalk was significantly increased due to applied K fertilizer in late growing season.

結(jié)果表明老太婆黄色片，釀酒葡萄葉片中氮含量遠高于葉柄，葉片中氮素含量隨著生育期的延長逐漸降低人人操狠狠插，而葉柄中氮含量隨施肥深度增加和生育期延長而產(chǎn)生的變化很小一级黄色网站片AV，40cm的施肥深度能顯著增加葉片中氮素含量；葉柄磷素平均含量高于葉片韩国三级国产精品，全生育期葉片磷含量變化很小狼友推荐网址，而施肥60cm深度顯著促進了葉片和葉柄中磷含量的提高国内精品免费视频在线播放；葉柄中鉀含量遠高于葉片，施肥深度對葉柄和葉片中鉀含量未產(chǎn)生明顯影響国产一级A爱大片免费视频-百度，但生育后期追施鉀肥顯著提高葉片鉀含量；施肥深度達到40cm時釀酒葡萄的產(chǎn)量最高八戒成人影院午夜在线观看，而60cm的施肥深度產(chǎn)量顯著下降。

The results showed that the grain yield of winter wheat with two-irrigation was higher than that with one-irrigation with the same nitrogen application rate and method. Compared to one-irrigation,the grain number per spike in two-irrigation was higher,the 1000-grain weight was lower, the water wastage was higher, but the WUE was lower. The yield was not affected significantly by nitrogen rates and the methods. Within the nitrogen rate of 157.5-295.5kg/hm2, the lower NUPE and Nitrogen Productivity declined with nitrogen rate increasing. NHI was not lower than the others at the lowest nitrogen rate of 157.5kg/hm2. The accumulation of NO3--N in soil was significantly and positively correlated with the nitrogen application rate. NO3--N in one-irrigation was distributed mainly in the top layer (0-80cm), but it was inverse in two-irrigation.

結(jié)果表明，施氮量和施氮方式相同時春澆二水冬小麥的產(chǎn)量高于春澆一水欧美性情A片，二水穗粒數(shù)較一水高，千粒重則低于一水午夜激爽免费毛片，一水耗水量較少97亚洲综合色成在线观看，水分利用效率明顯高于二水；同一水分下不同施肥量及施肥方式對產(chǎn)量的影響差異不顯著一级毛片性爱视频网站，同一施肥方式下在157.5-295.5kg/hm2范圍內(nèi)美女裸体让男人玩动态图，施肥量越大，氮素生理效率和氮肥生產(chǎn)力越低日本人黄色免费网站，施氮157.5kg/hm2時国产精品久久五月丁香，氮收獲指數(shù)均處在最高或較高水平；土壤硝態(tài)氮殘留量與施氮量呈顯著正相關(guān)超碰潮喷，成熟期一水條件下土壤中硝態(tài)氮主要集中在上層(0~80cm)999在线观看视频大全，二水條件下則主要分布在中下層。

Fertilizing date presented obvious effects on root growth and distribution. Fertilization after watering was more primitive to the root in up-soil layers than before watering. Fertilization of Ca-Mg was positive to the increase of root in 5-15cm soil layer, but negative to that in the surface layer. Both fertilization date and Ca-Mg fertilizer affected root vigor obviously.

施肥時期對根系也具有明顯的影響久久夜色精品国产60，與灌水前施肥相比，灌水后施肥有利于促進根系在上層土壤中的生長和分布一级伦奷视频97人人模；鈣鎂肥的施用能增加5~15cm土層根重欧美性v，但對表層根的生長不利，施肥時期和鈣鎂肥施用與否對根系活力的影響也較大日韩十八禁大尺度三级片免费在线观看。

Computer aid cotton field nutrients regionalize management based on nutrients spatial interpolating and fertilizer recommendation system based on GIS were studied.

以新疆生產(chǎn)建設(shè)兵團芳草湖農(nóng)場、新湖農(nóng)場和81性欧美69式XXXX、89團為基地18岁黄直播件永久看的，通過多點分散肥料試驗建立了綜合施肥模型并對幾種施肥模型和模型參數(shù)進行了研究；應(yīng)用反射儀測定棉株硝酸鹽含量，建立了棉花快速營養(yǎng)診斷追肥指標老女人性生活视频；應(yīng)用農(nóng)田養(yǎng)分分析數(shù)據(jù)和相關(guān)農(nóng)業(yè)技術(shù)資料亚洲色图欧美色图另类图片，建立了芳草湖農(nóng)場GIS數(shù)據(jù)庫；建立了基于GIS欧美瑟瑟网站、以綜合施肥模型為核心的棉田養(yǎng)分分區(qū)管理和推薦施肥系統(tǒng)一线极品白馒头自慰喷水。

Using quadratic rotational regression combination design to study the influence on yield and economic characters in different fertilizer and density of the rape, the result showed that the influence of density and fertilizer on yield and active silique per plant were significant but the quantity and weight of seed, while the influence of density on active silique per plant was higher than that of fertilizer but on yield was contrary.

結(jié)果表明，在本試驗范圍內(nèi)专干老熟女色视频，施肥量和密度對油菜單株有效角果數(shù)和產(chǎn)量均有顯著的影響亚洲第页，對單株有效角果數(shù)的影響是密度大于施肥量538亚洲精品视频，而對產(chǎn)量的影響則是施肥量大于密度；單株有效角果數(shù)的最佳組合為施肥量以純氮227.0kg/hm2超碰个人免费、密度9.4萬株/hm2H国产A片网站，產(chǎn)量的最佳組合為施肥量以純氮235.7kg/hm2美女黄视频黄视频、密度10.6萬株/hm2；當控制施肥量2017年一级A片免费在线观看网站、密度分別為214.4—256.9kg/hm2欧美一级特黄大片色视频、10.1—11.1萬株/hm2時，油菜產(chǎn)量可達3000kg/hm2以上国产.zipai。

The result of fertilizer management of Sutian8 shows: what use the fertilizer of early stage handled, the plant height, ear height, stem thickness, leaf area etc. were better than early stage apparently, did not apply fertilizer to hand. Fertilized in lump sum on early stage, although expression was sent early for strong sprout, had also formed high-yield group, but later stage had the phenomenon of premature senility; Early stage did not be applied fertilizer, even if in late stage mend the fertilizer of equal quality could not also remedy. Corn ear output and quality would not raised unless the fertilizer applied at prophase (45%-60%), metaphase and anaphase had a certain proportion.

蘇甜八號不同時期肥料運籌試驗結(jié)果表明：施用前期肥的處理亚洲AV永久无码无毒，無論是在株高欧美性爱b啪啪、穗高、莖粗一级真人特黄大片录、葉面積等植株性狀上影音先锋啪啪av资源网，還是在果穗、產(chǎn)量性狀上均顯著優(yōu)于前期不施肥的處理特级无码毛免费视频，前期一次性重施肥日韩在线丝袜福利网站大全，雖表現(xiàn)為壯苗早發(fā)黄色网站入口观看，也形成了豐產(chǎn)群體，但后期有早衰現(xiàn)象a级免费黄色网站大全，前期不施肥，即使中后期補施同等數(shù)量的肥料也無法彌補因前期不施肥所造成摘要的影響，只有前天天操屄、中男人插女人的底下的黄色的视频、后按一定比例且適當提高前期肥的用量(45%一6006)才有利于提高鮮果穗產(chǎn)量和商品品質(zhì)。

The difference in yield, its components, basic characteristics such as mean size and bare tip length of cobs, plant height, base internode diameter, secondary root number per plant, LAI and DMW at the same measuring date, between the three treatments were insignificant respectively; the optimized fertilization made the three leaves around corn cob rather smaller, the cob leaf slightly thinner, a decrease of the cob leaf chlorophyll content at greater rate at the later stage, and dry matter accumulation amount slightly reduced from flowering to grain filling.

在優(yōu)化施肥黄网站毛片、秸稈還田優(yōu)化施肥及傳統(tǒng)施肥條件下欧美老妇尻屄，夏玉米穗長、穗粗、禿頂長涩涩视频在线下载、株高日韩亚洲欧美视频、基部伸長節(jié)間粗度、單株各層次生根條數(shù)国产城中村自拍、同一時期的葉面積指數(shù)和干物質(zhì)積累量無顯著性差異。在優(yōu)化施肥條件下无码视频性交，夏玉米棒三葉總?cè)~面積略微減少人人操人人人看，穗位葉葉片略微變薄日韩无码高清啪啪啪高潮，生育后期穗位葉葉綠素含量下降稍快，吐絲-收獲的干物質(zhì)積累量略有下降亚洲淫乱性图。

Treatments were as follows: fertilization during leaf-expansion period, fertilization during green-leaf period, and no fertilizer. Results showed that individual leaf area, thousand-leaf weight, and leaf distribution were relatively stable with little influence from fertilization. Fertilization during leaf-expansion compared to the green leaf period significantly increased leaf number, leaf weight per plant, and leaf area index. Fertilization during led-expansion also significantly increased the total weight of leaves corresponding to each branch. The 14th to the 17th branches had the largest number of leaves in the canopy with fertilization increasing the weight of each branch but not changing the center of the canopy.

結(jié)果表明：毛竹單葉面積、千葉質(zhì)量和葉片分布受施肥的影響較小藏精阁无码一区二区在线，是較為穩(wěn)定的指標在线免费观看H片；展葉期施肥處理（處理1）能顯著增加單株立竹的葉片數(shù)量，到7月底，其單株立竹葉片總質(zhì)量和葉面積指數(shù)分別比綠葉期施肥（處理2）提高14.8%和13.7%，比不施肥提高27.6%和24.5%色呦哟网站；冠層14~17檔是單枝葉片數(shù)量最多的區(qū)域欧美人人妻人人操，施肥能增加各枝盤葉片的質(zhì)量，但對林冠重心的分布無影響；單葉葉面積穩(wěn)定后（6月），處理1的葉綠素測定值和光合速率顯著高于處理2和對照毛片在线观看免费网站，而處理2與對照間無顯著差異。