發(fā)布時(shí)間：2019-07-03 17:12

【摘要】：以呼倫貝爾羊草割草地為對(duì)象,采用正交試驗(yàn)設(shè)計(jì),研究了不同水平的氮磷鉀配施對(duì)該地區(qū)牧草產(chǎn)量和品質(zhì)的影響。結(jié)果表明:(1)CH6(N3P3K3)產(chǎn)量最高(3579.73kg/hm2),顯著高于CK(P0.05)。該地區(qū)施肥量的最優(yōu)組合為氮肥(181.96kg/hm2)+磷肥(321.84kg/hm2)+鉀肥(47.01kg/hm2)。(2)牧草營(yíng)養(yǎng)物質(zhì)含量對(duì)不同施肥配比的響應(yīng)不同,牧草的粗蛋白質(zhì)含量CH3(N2P3K3)組合最優(yōu);粗脂肪含量的最優(yōu)組合為CH13(N2P3K2);CH14(N3P2K2)、CH13(N3P2K2)分別是酸性洗滌纖維、中性洗滌纖維含量最優(yōu)組合。(3)牧草營(yíng)養(yǎng)物質(zhì)含量對(duì)不同N、P、K施肥水平的響應(yīng)不同,牧草粗蛋白質(zhì)質(zhì)含量和粗脂肪含量分別在N4和K2水平顯著高于其他水平,酸性洗滌纖維在P2水平顯著低于其他水平,牧草品質(zhì)最優(yōu)組合為N4P2K2。綜合牧草產(chǎn)量、品質(zhì),呼倫貝爾天然割草地進(jìn)行配方施肥時(shí)應(yīng)保持N肥、P肥用量,減少K肥用量。
[Abstract]:Taking the mowing grassland of Leymus chinensis in Hulunbeier as the object, the effects of different levels of nitrogen, phosphorus and potassium on the yield and quality of herbage in this area were studied by orthogonal design. The results showed that: (1) the yield of CH6 (N3P3K3) was the highest (3579.73kg/hm2), which was significantly higher than that of CK (P 0.05). The optimal combination of nitrogen fertilizer (181.96kg/hm2) phosphate fertilizer (321.84kg/hm2) potassium fertilizer (47.01kg/hm2). (2) forage nutrition content was different, the crude protein content CH3 (N2P3K3) combination was the best, the crude fat content was CH13 (N2P3K2), and the crude protein content (N2P3K3) combination was the best. CH14 (N3P2K2) and CH13 (N3P2K2) were the best combinations of acid detergent fiber and neutral detergent fiber content, respectively. (3) the response of forage nutrient content to different N and K application levels was different. The crude protein content and crude fat content of forage grass were significantly higher than those of other levels at N4 and K2 levels, respectively. The acid detergent fiber level at P2 level was significantly lower than that of other levels, and the optimal forage quality combination was N4P2K2. According to the yield and quality of forage, the amount of N fertilizer and P fertilizer should be kept and the amount of K fertilizer should be reduced when Hulunbeir natural mowing grassland was fertilized by formula.
【作者單位】： 內(nèi)蒙古農(nóng)業(yè)大學(xué)草原與資源環(huán)境學(xué)院;中國(guó)農(nóng)業(yè)科學(xué)院農(nóng)業(yè)資源與農(nóng)業(yè)區(qū)劃研究所;呼倫貝爾學(xué)院生命科學(xué)與化學(xué)學(xué)院;中國(guó)農(nóng)業(yè)科學(xué)院草原研究所/農(nóng)業(yè)部草地生態(tài)與修復(fù)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家公益性行業(yè)(農(nóng)業(yè))科研專(zhuān)項(xiàng)“半干旱牧區(qū)天然打草場(chǎng)培育與利用技術(shù)研究與示范”項(xiàng)目(2013060) 呼倫貝爾退化草甸草原綜合治理技術(shù)與模式項(xiàng)目(2016YFC0500603)
【分類(lèi)號(hào)】：S812.4

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