The kinetics of degradation of healthy paddyfield ecosystem due to unreasonable fertilization are as follows.(1) The rice growth was interfered and the structure of microbe population was altered through applying excessive nitrogen fertilizer, while the yield of rice was decreased later and the secretion was reduced from rice root, which induced the Eh and the quantities of Bacterium and Actinomycetes declining, and the contents of MBC, MBN, MBP low in the soil. All of that made the capacity of accommodating nutrient weak in microbe ecosystem.

不合理施肥引起的稻田生態(tài)系統(tǒng)退化的動力學特征是：(1)重施氮肥首先使水稻植株生長受阻，同時改變土壤微生物種群結構美国黄片aaa，從而直接使水稻產量降低A片β片毛片免费视频，稻田土壤生產力受損，并產生一系列不良次級反應：水稻生理活動減弱減少了根系分泌量操一操在线，同時也降低了土壤Eh，使稻田土壤細菌AV片片A爽A片、放線菌數量降低免费AV黄片，MBC、MBN以及MBP含量下降国产又色又猛又黄又大视频，微生物保肥一区无码在线、供肥能力降低，從而土壤微生物生態(tài)系統(tǒng)功能弱化。

The aim of this study was to determine the effect of panicle nitrogen fertilizer on starch characters and quality properties of rice.

以4種不同類型的稻米為材料影音先锋操逼网，采用4四個不同的氮素穗肥處理my国产精品免费，利用黏度分析儀和XRD技術測定其淀粉特性，探索氮素穗肥對稻米品質及淀粉特性的影響99se在线播放。

The reactivities of phosphate rock in China are low and its impurity,especially the Mg is high.

鑒于我國不少磷礦的反應活性偏低和雜質對高濃度磷復肥的生產不利天天婬色婬香综合网站日本，指出：磷肥工業(yè)的發(fā)展應結合因礦制肥的原則，對低品質的磷礦應著重提高磷肥產品有效養(yǎng)份和產品質量亚洲日韩欧美另类。

By Visual Basic 6.0 program, taken the distance between hole 200mm and buried depth 120～150mm as the optimization goal, the most optimum parameters range of the mechanism was obtained as follows: the initial angle between planet frame and the line formed from spraying-fertilizer needle-tip and planet wheel axle was -45°～-40°, the initial angular displacement of planet frame was 40°～50°, the distance between spraying-fertilizer needle-tip and the planetary gear axle center was 280～300mm, simultaneously, the semi-major axis of elliptic gear was 29.364mm, the teeth quantity was 23, the ratio of semi-minor axes and semi-major axis was 0.958, the radius of circular gear was 25mm.

對該機構進行運動學分析色综合无码视频，建立了數學模型，以穴距200mm和入土深度120～150mm為尋優(yōu)目標這一個毛片，應用Visual Basic 6.0軟件編程得出滿足機構運動要求的最優(yōu)參數范圍為：噴肥針尖和行星輪軸連線與行星架的初始夾角-45°～-40°国产三级综合、行星架初始角位移40°～50°、噴肥針尖與行星輪軸心距離280～300mm深夜欧美日韩福利，此時橢圓齒輪長半軸29.364mm麻豆AV在线网站、齒數23、短半軸與長半軸比0.958男人的天堂一级片，正圓齒輪半徑25mm亚洲国产精品综合高清入口久久。

You look like a plus-size princess.

暈，我看你只是個"肥肥公主"99久久国产精品无码免费。

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日韩18禁图片区综合，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免费黄色网业大全；鈣鎂肥的施用能增加5~15cm土層根重日韩精品娱乐在线观看网站免费，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黄片69。

Witnesses describe the killer as a fat, bright-red, snakelike animal measuring 2 to 4 feet in length and weighing more than 20 pounds.

目擊者稱那個家伙是一個肥肥的国产欧美亚洲另类第三十页，大紅色的，類似蛇形的動物91夜色精品国产网站，約2至4英尺長国产激情视频久久久，重量超過二十磅。

In the top subalpine meadow habitat, 131 rodents of 7 species were captured and the capture rate was 14.69%.

北社鼠與黑線姬鼠的肥滿度在次生林中最高，分別為2.58和3.12污污污污污www免费网站；大林姬鼠的肥滿度在灌木叢中最高黄色一级片大相焦，為3.51。

That means you may find it is very difficult to tenderize the tough outer layer of lean meat on belly pork.

秘訣1AAA搡老熟女国产。倘若要豬肉肥而不膩、入口即化av在线免费资源，秘訣是切除豬腩肉的底層肉国产激情自拍小视频，原因在於現在的豬肉肉質有別於當年99玖玖，尤其豬腩內的底層肉特別難燜得軟嫩，就算加長燜的時間国产在线b，亦不能解決此問題视频国产欧美，只會將豬腩肉肥的部分煮融，瘦的部分仍然乾及硬欧美色操，切除的底層肉可以留起放湯18岁网。

In people the impression that the road toll station work is a "bad fat", but how fat?

在人們印象中，公路收費站的工作是個"肥差"日本亚洲国产精品麻豆www，但到底有多肥日韩无码视频二区？