本文選題：間作　切入點：玉米　出處：《水土保持研究》2017年05期 　論文類型：期刊論文

【摘要】：玉米大豆間作體系對土壤流失的影響研究多集中在地上部,而鮮有研究報道玉米大豆間作根系特征對固土拉力特性的影響。采用田間徑流小區(qū)試驗,研究了坡耕地條件下玉米大豆間作(MD)、玉米單作(MM)、大豆單作(DD)和裸地(CK)的生物量和根系固土拉力。結(jié)果表明:MD處理的玉米根系密度較MM處理增加了19.64%,10—20cm土層深度范圍內(nèi)MD處理與MM和CK處理間差異顯著(p0.05),MD處理較MM和CK處理分別高出了4.25%和4.84%,在0—10cm范圍內(nèi),MD處理較MM和CK處理分別提高了2.49%和15.85%,在20—30cm范圍內(nèi),MD處理較MM和CK處理分別提高了1.56%和6.25%。MD處理的地上部分鮮重生物量較MM處理增加了2.46%,干重生物量較MM處理增加了7.31%,地下部分鮮重生物量較MM處理增加了5.06%,干重生物量較MM處理增加了3.17%。在0—30cm土層范圍內(nèi),能有效保持土壤水分,提高土壤含水率。MD處理較MM處理、DD處理和CK處理不論在玉米樣方還是在大豆樣方其固土能力均強,在施加相同荷載情況下,間作處理比單作處理土壤樣方的位移偏移量較單作處理時偏移量小。
[Abstract]:The effect of maize and soybean intercropping system on soil loss was mainly focused on the aboveground part, but the effect of maize and soybean intercropping root system on the soil tensile strength was seldom reported. The field runoff plot experiment was used to study the effect of maize and soybean intercropping system on soil loss. The biomass and soil holding capacity of maize and soybean intercropping (MDN), maize monoculture (MMN), soybean monoculture (DDD) and bare land CK (CK) under sloping cultivated land were studied. The results showed that the root density of maize treated with 20% MD increased the depth range of 19.6410 ~ (-20 cm) than that of MM treatment. The difference between internal MD treatment and MM and CK treatment was significantly higher than that of MM and CK treatment by 4.25% and 4.84, respectively. In 0-10cm range, MD treatment was 2.49% and 15.85cm higher than that of MM and CK treatment, and the MD treatment was higher than MM and CK treatment in the range of 20-30cm, respectively. The fresh biomass of aboveground part increased by 1.56% and 6.25.MD treatment increased 2.46g than that of MM treatment, the dry weight biomass increased 7.31than that of MM treatment, the fresh weight biomass of underground part increased 5.066g than that of MM treatment, and the dry weight biomass increased 3.17cm than that of MM treatment. It can effectively maintain soil moisture, increase soil moisture content. MD treatment has stronger soil consolidation ability than MM treatment and CK treatment, both in maize sample and soybean sample, under the same load. The displacement migration of intercropping treatment was smaller than that of mono-cropping treatment.
【作者單位】： 云南農(nóng)業(yè)大學資源與環(huán)境學院;昆明佳曉自來水工程技術(shù)股份有限公司;
【基金】：國家自然科學基金“坡耕地紅壤主要農(nóng)作物根系固土抗蝕生物力學特征研究”(41461059);“間作影響坡耕地紅壤團聚體分形特征和抗蝕性的機制”(41661063)
【分類號】：S157.433
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本文編號：1614978