mulch
[mʌltʃ]
n.
护根（用以保持水分、消灭杂草等的覆盖物，如稻草、腐叶或塑料膜）;
vt.
用护根覆盖（植物根部或其周围地面）;
例句:
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For bigger, better fronds, mulch with compost now.
来自THETIMES
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In May, mulch the bed with garden compost.
五月，在苗圃里施上肥。
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I used stable muck as a mulch for my roses.
我用厩肥做我玫瑰的护根.
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A loose mulch acts on the surface as an insulator.
疏松的覆盖物在土壤表面起了隔热的作用.
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Mulch around the plants with some fine gravel.
来自THETIMES
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Surround plants with a fresh layer of mulch each spring.
来自BBC