| 1. | Bare soil is protected from the impact of rainfall which can cause surface soil crusting , compaction , and erosion
塑料薄膜覆盖使裸土免受降雨引起的表土结壳、压实和侵蚀。 |
| 2. | On the contrary , the latent heat and sensible heat on a clear day is 60 % and 19 % of net radiation above bare soil surface
就平均状况而言，潜热、显热和土壤热通分别占到净辐射的40 、 50和10 。 |
| 3. | Validation of the presented approach is verified through numerical simulations of radar measurements over the bare soil surfaces
本研究以裸露土之土壤?度及其雷达散射系数的数值模拟来验证此一方法之有效性。 |
| 4. | Validation of the presented approach is verified through numerical simulations of radar measurements over the bare soil surfaces
本研究以裸露土之土壤湿度及其雷达散射系数的数值仿真来验证此一方法之有效性。 |
| 5. | It was found that forest soils were stronger in aggregate stability compared with parent material or bare soils
在各种土地利用方式中，林地土壤的稳定性最高，母质层和荒地土壤稳定性最小，而园地的稳定性大于耕地。 |
| 6. | The daily albedo variation , which is big in the morning and afternoon and smallest at midday , emerge parabola above spring wheat and bare soil surface
春小麦和裸地两种不同下垫面的地表反射率日变化均呈现出抛物线特征，早晚反射率较大，正午反射率最小。 |
| 7. | In addition , the big aggregate of parent material layer and bare soils had the biggest slaking index ( rsi ) and the cultivated soils ranked the next place
利用方式中，母质层和荒地土壤的大团聚体消散系数（ rsi ）最大，其次是耕地。而小团聚体中，耕地的rsi最小。 |
| 8. | ( 3 ) compared with bare soil , income of net radiation declined , apparent heat weakened and latent heat exchange were almost disappeared on the soil surface with film
( 3 )薄膜覆盖于土壤表面后，与未覆盖的土壤相比，地表净辐射r _ n收入下降，显热交换p减弱，潜热交换le趋于零。 |
| 9. | We found that the higher midlayer and deeplayer water contents after harvest , the faster alfalfa grew , and , the more quickly covered the bare soil , the more soil evaporation restrained . in this way , the soil could sustain higher shallow soil water contents
即使在平水年和丰水年，在7月之前降水也不能满足苜蓿的正常生长需要，而在7月以后，降水量略大于苜蓿需水量，所以要获得高产必须进行灌溉。 |
| 10. | During the growing season , the soil water content from 0 - 200 cm of vegetated sites was closely related to precipitation , but the barren slope was different . soil water content under bare soil remained relatively high ( 12 % ) throughout the growing season
各植被类型立地0 ? 200cm土壤水分的季节变化与降水量的季节分布一致，但对照裸坡地整个生长季土壤水分呈波动变化，平均土壤含水量维持在12左右的较高水平。 |
