Its meaning and indicatrix clolny quality and its main culture measure will change when yield from low and middle to high,we must change concept,changing culture measure from amount to quality.
英
美
- 當其產(chǎn)量由中、低產(chǎn)進(jìn)入高產(chǎn)和超高產(chǎn)階段以后，群體質(zhì)量?jì)群?、指標及其主要栽培措施發(fā)生變化，因此，應更新觀(guān)念，從數量栽培向質(zhì)量栽培轉變。
