Although the quality of day lily of Qingyang city is best in the whole country, the day lily is planted fragmentarily at the residence, roadside, bank of the canal, low bank of border, and district of field, and also do not form the best product region and suitable planting technology. The product region environment condition of day lily in Qingyang city was analyzed from2001 to 2005, the advantageous product regions of day lily in Qingyang city was planned, and planting technology of day lily was studied. The main result of study were as follows:First. Qingyang city belongs to dry agricultural region, its solar radiation is quite rich, but the water resources is short in all district, the agricultural production depends on the natural precipitation.

生產(chǎn)的黃花菜質(zhì)量在全國(guó)名列前茅，但是慶陽(yáng)的黃花菜多在宅旁国产精品视频男人的天堂、路邊欧美黄色视频A一级黄色视频、渠岸、田邊地埂等零星地進(jìn)行生產(chǎn)亚洲h版在线，沒(méi)能形成優(yōu)勢(shì)產(chǎn)區(qū)日本黄色网站进入入口，對(duì)栽培技術(shù)研究也較少。2001年～2005年我們分析評(píng)價(jià)了慶陽(yáng)市黃花菜產(chǎn)區(qū)環(huán)境国内自拍日韩高清视频在线观看免费，進(jìn)行了黃花菜優(yōu)勢(shì)產(chǎn)區(qū)區(qū)劃和旱作栽培技術(shù)研究欧美黄色免费网站视频，主要研究結(jié)果如下： 1 慶陽(yáng)市太陽(yáng)輻射比較豐富，水資源缺乏久久a爱视频，農(nóng)業(yè)生產(chǎn)靠天然降水欧美动日韩中文，屬旱作農(nóng)業(yè)區(qū)，河流大部分水質(zhì)較好国产性爱永久视频，灌溉水源基本未受到污染欧美一级网址。

According to regulations of the government, in addition to afforested land, the area of bush forest, the area of forest land inside farm land and the area of trees planted by the side of farm houses and along the roads, rivers and fields should also be included in the area of afforested land in the calculation of the forest coverage-rate.

在計(jì)算森林覆蓋率時(shí)，森林面積包括郁閉度0.2以上的喬木林地面積和竹林地面積黄片免费观看无码视频，國(guó)家特別規(guī)定的灌木林地面積玖玖爱网、農(nóng)田林網(wǎng)以及四旁（村旁、路旁免费爱爱网址、水旁亚洲色无码一级毛片一区二区看、宅旁）林木的覆蓋面積。