免耕、深松對不同土層土壤物理特征的影響
[Abstract]:In order to investigate the effects of long-term no-tillage and deep soaking on soil physical characteristics, stratification was carried out in a long-term localizing experiment. The soil density, soil water holding capacity, water supply capacity, field water holding capacity, saturated water content and available water content in different soil layers of 0~100cm were measured by 90~100cm. The results showed that with the deepening of soil layer, the soil density decreased first and then increased and then became stable, the water holding capacity of soil decreased first and then increased, and the water supply capacity of soil increased first and then decreased and then increased slowly. The field water capacity decreased gradually and then increased, while the available soil water increased first and then decreased and then tended to stabilize. The soil density of deep loosening treatment above 40cm is relatively low, and the water holding capacity of 20~50cm soil is the strongest, while that of 60~80cm soil is the lowest. In 0 ~ 10 and 40~80cm soil layers, the ability of soil water supply was as follows: no tillage and deep loosening conventional tillage. In 20 ~ 40 and 80~90cm soil layers, the water supply capacity of deep loosening treatment is stronger. In the 0~10cm soil layer, the saturated water content and the field water capacity of each treatment are as follows: conventional tillage with no tillage and deep loosening, conventional tillage with deep loose tillage in 20~50cm soil layer, conventional tillage with deep loose tillage with no tillage with deep loosening in 50~80cm soil layer; Under the 80cm soil layer, deep loose no-tillage conventional tillage. The soil available water content in 0~10cm soil layer under no-tillage treatment was significantly higher than that in other treatments, but in 10~50cm soil layer, deep loosening treatment was the highest.
【作者單位】: 河南省農(nóng)業(yè)科學院植物營養(yǎng)與資源環(huán)境研究所;農(nóng)業(yè)部作物高效用水科學觀測實驗站;河南邦友科技有限公司;
【基金】:國家自然科學基金項目(U1404404) 河南省農(nóng)業(yè)科學院優(yōu)秀青年科技基金項目(2016YQ12) 國家“863”計劃項目(2013AA102904)
【分類號】:S152
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