Aeration method was used to study the influence of different modes of fertilization on soil NH3 volatilization on corn farmlands.

采用通氣法進(jìn)行不同秸稈還田方式、施肥時(shí)期和方法對(duì)春玉米農(nóng)田土壤氨揮發(fā)影響的研究人人夜夜揉r精品国产。

Compared with conventional fertilizer application pattern , soil infiltration capacity , water-conserving ability , water availability and water use efficiency under hole-source pattern were all increased to different degree . Water distribution on soil profile, especially the soil water distribution in root zone was more reasonable . Therefore , modulating function of soil reservoir could elaborate effectively .

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In the numerous extension patterns, the government leading extension pattern is the strongest, quicker, and the extension area is larger, but the extension system should be further strengthened, and the policy supports should be given by the government. The extension pattern with the research institutes as the main body is strict and scientific, and is welcomed by the peasants, but the extension strength is weak. The extension pattern with the companies as the main body has the advantage in the extension area, and is a new pattern, but the service consciousness of the agricultural fertilization should be strengthened. The extension pattern with the supply and marketing cooperative as the main body has the advantage of retailing fertilizers, but the technical training to the vocational staff should be strengthened. In the extension pattern with the chain radiation as the main body, the activity of the peasants is higher.

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A man of words and not of deeds is like a garden full of weeds.

光說不做的人，是用唾沫為自己的雜草施肥自拍偷拍亚洲精品。

E. Matteuccia struthiopteris Todaro, Aegopodium alpestre, Taraxacum mongolicum and Allium macrostemon in Dark Brown Forest Soil, using Na2SeO3 for fertilization, varying in application rate from Se 0.10 to 10.00 mg kg^(-1), directly into the top 15 cm soil layer.

硒肥種類為亞硒酸鈉一级aa片视频，施硒量為0.10~10.00mg kg^(-1)，直接施肥范圍為0~15cm表土国产日韩欧美主播。

The effects of low level N亚洲欧美国产色图、P、K on seedling height and ground diameter of Agathis dammara were better than high levels. The treatment N1P1K1 namely urea 2.2 grams, fused calcium-magnesium phosphate fertilizer 16.6 grams, potassium chloride 1.7 grams showed the best fertilization and high significant to other treatments.

結(jié)果表明99久久播放视频，1~8個(gè)月不同處理間都呈極顯著差異小www久久久，低水平的營養(yǎng)元素對(duì)促進(jìn)貝殼杉苗高和地徑的生長好于高水平，以N1P1K1處理即尿素2.2gwww.操逼.com，鈣鎂磷肥16.6g亚洲欧美裸体一级播放，氯化鉀1.7g為施肥效果最好，且與其它處理呈極顯著差異不卡性爱视频。

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Function:With the removal of akey function,an instant multi-block removal of the fruits of the ground High-precision time and time calibration errors compensate to stealing the majority of the fruit under the plug-in caretaker Just to meet the mature fertilization,early harvest,Thief is also impossible to steal the fruits of your Support password encryption preservation,easy next time you log;support multiple login ID Weeding,pesticides,watering three to gain experience detecting and recording,when the reach 300 points,and stop these activities,to prevent being found in TX To be mature at aglance to see the fruits of the time friend May designate anon-automatic operation Friends Butomatic Identification of new species Database records friends farm state,after the next time you log reduction in the number of friends Scan Friends File View

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We measured the photosynthesis of Roegneria kamoj, Polygonumsphaerostachyum, Koeleria cristata, Kobresia myosuroides, Ligularia sagitata and Anaphalis lacteal under different soil status and investigated the variations ofcommunity composition after fertilizer to find out the mechanism ofαdiversityformation at local community level. At metacommunity level, we compared the effectsof distance and environmental gradient on the community similarity indexes of fourdifferent locations in two hills to seek the mechanism of D diversity formation.

在局域群落中欧洲曰批视频免费看，以高寒草甸植物群落的重要組分種：鵝觀草55夜色66夜色国产精品视频、球花蓼、洽草免费视频A片一级、嵩草A毛片在线导航、箭葉橐吾和乳白香青為對(duì)象，通過施肥處理后光合能力以及群落結(jié)構(gòu)的變化探討α多樣性的形成機(jī)制亚洲天堂av天堂草；在集合群落水平上久草视频一区二区在线观看，通過對(duì)比兩座相距180 m山坡上4個(gè)不同坡向樣方間群落相似性與距離和環(huán)境梯度的相互關(guān)系，探討β多樣性的形成機(jī)制亚洲中文AⅤ中文字幕每天被。