Effects of feeding cows with Italian ryegrass was investigated in this paper. Italian ryegrass was grown in winter fallow paddy field.

試驗(yàn)對(duì)采用冬閑水田生產(chǎn)的意大利黑麥草Lolium multiflorum飼養(yǎng)奶牛效果進(jìn)行研究98自拍视频。

The results indicate that seasonal variations of CO2 emissions from cotton, fallow and winter wheat–summer corn rotation field are all remarkable.

結(jié)果表明女生被插喷水福利，在作物生長(zhǎng)季節(jié)內(nèi)棉花地、休閑地和冬小麥/夏玉米地土壤CO2排放均表現(xiàn)出明顯的季節(jié)變化規(guī)律午夜免费福利电影网。

Fallow lands of winter wheat in the southern part of loess plateau with an annual precipitation of 632mm were selected as the study object, Field and lab experiments were carried out during two wheat growth periods to investigate the correlations between N2O emissions and its influential factors, quantitative model and energy characteristics.

本研究以年均降水量為632mm的黃土高原南部旱作區(qū)冬小麥—休耕地土壤為對(duì)象最新日韩午夜在线电影网站观看，通過(guò)兩個(gè)小麥生長(zhǎng)年度不同處理的大田試驗(yàn)和相應(yīng)的室內(nèi)實(shí)驗(yàn)日韩中文字幕在线92页，對(duì)土壤N_2O排放量及其與影響因子的關(guān)系、定量模型和能量特征進(jìn)行了系統(tǒng)研究伊人久久精品中文字幕无码。

Beckmannia syzigachne had poor adaptability and competition ability in rape or wheat field with no-herbicide application in history, but would become dominant specie in water logged winter fallow, leading to yield loss of rape and wheat after a few years.

在實(shí)行正常農(nóng)事操作的稻茬油麥田中久久9，與其它主要雜草種群相比，其自然競(jìng)爭(zhēng)力弱普通话熟女高潮对白视频，難以成為群落的優(yōu)勢(shì)種欧美一级一二三。但其具有&喜濕性&的特點(diǎn)，在冬季常常積水的休閑田中艳情视频一区，發(fā)生量可大幅度上升欧美狂野在线观看视频。

Field trials were carried out to study the effects of summer fallow on water storage and NO-3-N accumulation in soil profile and the follow crops.

試驗(yàn)研究夏季休閑對(duì)陜西省關(guān)中地區(qū)中等肥力的紅油土壤蓄水、硝態(tài)氮(NO-3-N)累積及其對(duì)后季作物的影響国产精品视频网站大全。

Results indicated that under the conditionwhen there is lack of water in the soil, deep ploughing will lead to dec-rease yeild before sowing, deep ploughing will aggravate the dispellingof the soil water when the field is fallow in the summer.

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